In the present study, we use a training design in two experiments to examine whether bilingual language switching facilitates two components of cognitive control, namely monitoring and inhibitory control. The results of Experiment 1 showed that training in language switching reduced mixing costs and the anti-saccade effect among bilinguals. In Experiment 2, the findings revealed a greater decrease of mixing costs and a smaller decrease of the anti-saccade effect from pre- to post-training for the language switching training group compared (...) to the L2 training group. Overall, the results suggest that extensive exercise in monitoring and inhibitory control among languages in an experimental setting may enhance the corresponding components of cognitive control. We discuss these findings in the context of the relationship between bilingual language control and executive control. (shrink)

The present study aimed to investigate the effects of acute aerobic exercise on underlying neuronal activities associated with task-switching processes including both mixing and switch costs. A total of 29 healthy young adults (21.4 ±1.2 years) participated in this study. The experiment consisted of an exercise and a rest condition. In the exercise condition, participants completed 30 minutes of walking and/or jogging on a motor driven treadmill sufficient to achieve an intensity of 70% of maximum heartrate (HRmax). In the (...) rest condition, participants rested quietly for 30 minutes. Both conditions were conducted on different days, and the order was counterbalanced across participants. Participants performed the task-switching paradigm (switching between two different tasks), after both exercise and rest conditions respectively. The P3 amplitude was smaller in the non-switch trial than the single trial only in the rest condition, but not in the exercise condition. In other words, more attentional resources were allocated to the non-switch trial requiring greater amounts of working memory following the exercise condition. Mixing and switch effects on the P3 component were influenced by acute aerobic exercise. This result suggests that acute aerobic exercise may serve to facilitate the flexibility of task-set reconfiguration and maintaining the task set in working memory. Furthermore, during the switch trials, the P3 latency was shorter in the exercise condition than in the rest condition. This result is consistent with the findings of previous studies, indicating that cognitive processing speed is increased only during task conditions requiring greater amounts of executive control. Our study clearly indicates that acute aerobic exercise may facilitate cognitive flexibility as well as other executive functions (i.e., inhibitory control and working memory). (shrink)

Participants were required to switch among randomly ordered tasks, and instructional cues were used to indicate which task to execute. In Experiments 1 and 2, the participants indicated their readiness for the task switch before they received the target stimulus; thus, each trial was associated with two primary dependent measures: (1) readiness time and (2) target reaction time. Slow readiness responses and instructions emphasizing high readiness were paradoxically accompanied by slow target reaction time. Moreover, the effect of task (...) switching on readiness time was an order of magnitude smaller then the (objectively estimated) duration required for task preparation (Experiment 3). The results strongly suggest that participants have little conscious awareness of their preparedness and challenge commonly accepted assumptions concerning the role of consciousness in cognitive control. (shrink)

Lying is typically more cognitively demanding than truth telling. Yet, recent cognitive models of lying propose that lying can be just as easy as truth telling, depending on contextual factors. In line with this idea, research has shown that the cognitive cost of deception decreases when people frequently respond deceptively, while it increases when people rarely respond deceptively (i.e., the truth proportion effect). In the present study, we investigated two possible underlying mechanisms of the truth proportion effect. In Experiment 1 (...) ( N = 121), we controlled for the impact of switch costs by keeping the number of switches between deceptive and truthful responses constant. We found that people who often responded deceptively made fewer errors when responding deceptively than people who only occasionally responded deceptively, replicating the truth proportion effect. Thus, while the truth proportion effect in earlier studies may be partially driven by the cost of switching between truthful and deceptive responses, we still found evidence for the truth proportion effect while controlling for switch costs. In Experiment 2 ( N = 68), we assessed whether the truth proportion effect is influenced by goal neglect. According to this view, the truth proportion effect should be reduced if participants are cued to maintain the task goals, while it should be larger when participants are allowed to neglect the task goals. In line with this hypothesis, we found a smaller truth proportion effect when participants were cued with the task goals compared to when they were not cued. This study shows that the truth proportion effect is influenced by goal neglect, implying that frequent deceptive responding strengthens the goal of responding deceptively. Our findings imply that the accuracy of lie detection tests could be increased by using a majority of truth-items (i.e., induce the truth proportion effect), and that the truth proportion effect should be maximized by (1) increasing the number of truth-lie task switches and (2) inducing goal neglect. (shrink)

The National Health Service (NHS) was the first healthcare system globally to declare ambitions to become net carbon zero. To achieve this, a shift away from metered-dose inhalers which contain powerful greenhouse gases is necessary. Many patients can use dry powder inhalers which do not contain greenhouse gases and are equally effective at managing respiratory disease. This paper discusses the ethical issues that arise as the NHS attempts to mitigate climate change. Two ethical issues that pose a barrier to moving (...) away from metered-dose inhalers are considered: patients who decline an inhaler with a smaller carbon footprint and increased cost. I argue that while a patient is not morally justified in refusing a more environmentally sustainable inhaler due to the expected harms, a doctor may still prescribe a metered-dose inhaler if they believe that switching without consent might undermine trust or substantially worsen the patient’s health. Turning to cost, I argue that the imperative to combat climate change means the NHS should accept small increased financial costs for lower carbon inhalers, even though this provides no additional direct benefit for the patient. I then go on to consider the implications of the preceding analysis for policy and practice. I argue for a policy that minimises the impact of inhalers on the climate by advocating for a principle of environmental prescribing and explore decision-making in practice. While the arguments here pertain primarily to inhalers, the discussion has broader implications for debates around healthcare’s responsibility to be environmentally sustainable. (shrink)

This commentary argues that the “illusion” to which Wegner refers in The Illusion of Conscious Will is actually the illusion that our conscious experience of mentally causing certain behaviors explains the behavior in question: It is not the subjective experience itself that is illusory, but the implied causal explanation. The experience of “mental effort” is cited as another example of this sort of illusion. Another significant example is the experience that properties of the representation of our mental images are responsible (...) for certain patterns of behavior observed in mental imagery experiments. Examples include the increase in reaction time found when details are reported from smaller images or when attention is switched between different places and features (imagined as further apart than they are) within a single image. These examples illustrate the nature of the “illusion” involved: It is the illusion that certain observed regularities occur because of the content of the experience, as opposed to the converse – that experience has the content it does because of what the person figures out would happen in the imagined situation. (shrink)

To meet the stability requirements for moving quadruped robots, it is important to design a rational structure for a single leg and plan the trajectory of the foot. First, a novel electrically driven leg mechanism for a quadruped robot is designed in this paper to reduce the inertia of the leg swing. Second, a modified foot trajectory based on a compound cycloid is proposed, which has swing-back and retraction motion and continuous velocity in the x-axis direction. Third, a Simulink platform (...) is built to verify the correctness of the proposed foot trajectory. The simulation result shows that when the flight phase and the stand phase switch, the impact of torque is smaller than the foot trajectory before modification. Finally, an experimental platform is constructed, and a control algorithm is written into the controller to realize the foot proposed trajectory. The results of the experiment prove the feasibility of the leg mechanism and the rationality of the proposed foot trajectory. (shrink)

Background: Positive effects of acute exercise on cognitive performances in general inspired research that investigated the effects of acute exercise on specific cognitive subdomains. Many existing studies examined beneficial effects of acute exercise on subsequent set shifting performance in healthy adults. Set shifting, a subdomain of executive function, is the ability to switch between different cognitive sets. The results of existing studies are inconsistent. Therefore, a meta-analysis was conducted that pooled available effect sizes. Additionally, moderator analyses were carried out (...) to identify covariates that determine the magnitude of exercise-induced set shifting benefits.Methods: Medline, PsycINFO, and SPORTDiscus were searched for eligible studies. Hedges' g corrected standardized mean difference values were used for analyses. Random-effects weights were applied to pool effects. Potential moderation of the effect of acute exercise on subsequent set shifting performance by exercise intensity, type of exercise, participants' age, and type of control group were examined.Results: Twenty-two studies were included into analysis. All aggregated effect sizes ranged from small to moderate. Overall, a small significant beneficial effect was revealed. Heterogeneity of included effect sizes was moderate and significant. Moderator analyses revealed a larger average effect in older adults than for studies examining younger adults. Light exercise led to larger effects than moderate or vigorous exercise. Studies testing acute exercise against active control groups showed a noticeably smaller average effect than studies that used passive or cognitive engaging control groups. Interestingly, application of resistance or aerobic exercise led to no different average effect sizes. However, none of the tested covariates reached statistical significance.Conclusion: Acute exercise improves subsequent set shifting performance. However, effect sizes are small, making the relevance for everyday life questionable. The results indicate that older adults benefit more from acute exercise than younger adults do. Light intensity exercise seems most effective while the type of exercise does not seem to influence the magnitude of effects. Research designs with active control groups show the smallest average effect, raising concerns about placebo effects.PROSPERO registration number: CRD42019138799. (shrink)

In eukaryotic cells the nucleus and its contents are separated from the cytoplasm by the nuclear envelope. Macromolecules, as well as smaller molecules and ions, can cross the nuclear envelope through the nuclear pore complex. Molecules greater than approx. 60 kDa and containing a nuclear localization signal are actively transported across the nuclear membranes, but there has been little evidence for regulatory mechanisms for smaller molecules and ions. Recently, diffusion across the nuclear envelope has been observed to be (...) regulated by nuclear cisternal Ca2+ concentrations. Following depletion of Ca2+ from the nuclear store by inositol 1,4,5‐trisphosphate or Ca2+ chelators, a fluorescent 10 kDa marker molecule was no longer able to enter the nucleus. Distinct conformational states of the nuclear pore complexes depended on the Ca2+ filling state of the nuclear envelope, supporting the assumption that a switch in the conformation of the nuclear pore complex may control the transport of intermediate‐sized molecules across the nuclear envelope. Thus nuclear Ca2+ stores may regulate the conformational state of the nuclear pore complex, and thereby passive diffusion of molecules between the cytosol and the nucleoplasm. The physiological significance of this finding is currently unknown. (shrink)

Resistance to inhibitors of cholinesterase 8A (Ric‐8A) is a prominent non‐receptor GEF and a chaperone of G protein α‐subunits (Gα). Recent studies shed light on the structure of Ric‐8A, providing insights into the mechanisms underlying its interaction with Gα. Ric‐8A is composed of a core armadillo‐like domain and a flexible C‐terminal tail. Interaction of a conserved concave surface of its core domain with the Gα C‐terminus appears to mediate formation of the initial Ric‐8A/GαGDP intermediate, followed by the formation of a (...) stable nucleotide‐free complex. The latter event involves a large‐scale dislocation of the Gα α5‐helix that produces an extensive primary interface and disrupts the nucleotide‐binding site of Gα. The distal portion of the C‐terminal tail of Ric‐8A forms a smaller secondary interface, which ostensibly binds the switch II region of Gα, facilitating binding of GTP. The two‐site Gα interface of Ric‐8A is distinct from that of GPCRs, and might have evolved to support the chaperone function of Ric‐8A. (shrink)

In this paper we question the hypothesis of bounded rationality against full rationality in the context of job changing behavior, via simple econometric explorations on microdata drawn from Worker Histories Italian Panel (WHIP) and Sample of Integrated Labor Market Biographies (SIAB). The identification strategy builds on a quasi-counterfactual experiment in which the performance of each voluntary mover is compared to the average performance of a peer-group of stayers of the same skill group, co-workers in the firm from which the movers’ (...) job switch originated. Voluntary movers are identifiable in the WHIP and SIAB datasets, while it is not possible to do the same among the stayers. Full rationality suggests that the performance of voluntary movers should be superior to the stayers’ (both voluntary and involuntary) as the involuntary stayers have a smaller decision set from which to choose. In this exploration we find a clear opposite result, which we take as evidence of bounded rationality of the movers. (shrink)

While slowness of movement is an obligatory characteristic of Parkinson’s disease (PD), there are conditions in which patients move uncharacteristically fast, attributed to deficient motor inhibition. Here we investigate deficient inhibition in an optimal sensory-motor integration framework, using a game in which subjects used a paddle to catch a virtual ball. Display of the ball was extinguished as soon as the catching movement started, segregating the task into a sensing and acting phase. We analyzed the behavior of 9 PD patients (...) (ON medication) and 10 age-matched controls (HC). The switching times (between sensing and acting phase) were compared to the predicted optimal switching time, based on the individual estimates of sensory and motor uncertainties. The comparison showed that deviation from predicted optimal switching times were similar between groups. However, PD patients showed a weaker correlation between variability in switching time and sensory-motor uncertainty, indicating a reduced propensity to generate exploratory behavior for optimizing goal-directed movements. Analysis of the movement kinematics revealed that PD patients, compared to controls, used a lower peak velocity of the paddle and intercepted the ball with greater velocity. Adjusting the trial duration to the time for the paddle to stop moving, we found that PD patients spent a smaller proportion of the trial duration for observing the ball. Altogether, the results do not show the premature movement initiation and truncated sensory processing that we predicted to ensue from deficient inhibition in PD. (shrink)

Impaired performance in verbal fluency tasks is a frequent observation in Parkinson’s disease. As to the nature of the underlying cognitive deficit, it is commonly attributed to a frontal-type dysexecutive syndrome due to nigrostriatal dopamine depletion. Whereas dopaminergic medication typically improves VF performance in PD, e.g., by ameliorating impaired lexical switching, its effect on semantic network activation is unclear. Data from priming studies suggest that dopamine causes a faster decay of semantic activation spread. The aim of the current study was (...) to examine the impact of dopaminergic medication on the dynamic change of word frequency during VF performance as a measure of semantic spreading activation. To this end, we performed a median split analysis of word frequency during phonemic and semantic VF task performance in a PD group tested while receiving dopaminergic medication as well as after drug withdrawal, and in a sample of age-matched healthy volunteers. Dopaminergic medication in the PD group significantly affected phonemic VF with improved word production as well as increased error-rates. The expected decrease of word frequency during VF task performance was significantly smaller in the PD group ON medication than in healthy volunteers across semantic and phonemic VF. No significant group-difference emerged between controls and the PD group in the OFF condition. The comparison between both treatment conditions within the PD group did not reach statistical significance. The observed pattern of results indicates a faster decay of semantic network activation during lexical access in PD patients on dopaminergic medication. In view of improved word generation, this finding is consistent with a concept of more focused neural activity by an increased signal-to-noise ratio due to dopaminergic neuromodulation. However, the effect of dopaminergic stimulation on VF output suggests a trade-off between these beneficial effects and increased error-rates. (shrink)

Common sense believes in objects which, if real, routinely lose component parts or particles. Statues get chipped, people undergo haircuts and amputations, and ships have planks replaced. Sometimes philosophers argue that in addition to these objects, there are others which could not possibly lose any of their parts or particles, nor have new ones added to them--objects which could not possibly have been bigger or smaller, at any time, than how they actually were.1 (Sometimes the restriction on size is (...) argued independently of the restriction on switches of parts.2) If these other objects are real at all, they are alarmingly abundant. Exactly where the statue sits, there sits a parcel or piece of clay which would cease to be itself, and hence cease to exist, were even so small a part as the statue's nose removed.3 In exactly the place where the recently reconditioned ship is found, there is a mass of wood which never contained, and never could contain, any particles of wood--or bits of wood-stuff--other than those it now has.4 Moreover, since masses of matter (or "aggregates") can continue to exist even if divided into separate parts, while parcels cannot, the abundance is two-fold: where every parcel is found, there is also a mass.5 But how can there be room for all these additional objects if, at any time, two different objects cannot occupy exactly the same place? Or, worse, if even some of these additional objects are real, how can room remain for familiar objects? Recent treatments of this ancient puzzle have urged that we retain both "the principle of one object to a place" and the other ontological assumptions which make that principle seem to force a choice between affirming the reality of familiar objects, and that of the strangely brittle intruders.6 But all the recent treatments have left standing the reality of at least some of these brittle objects.7 By doing so they have passed up what is, perhaps, the simplest and safest response to the ancient puzzle.. (shrink)

During the current financial crisis, the need for an alternative to a laissez-faire ethics of capitalism (the Milton Friedman view) becomes clear. I argue that we need an order ethics which employs economics as a key theoretical resource and which focuses on institutions for implementing moral norms. -/- I will point to some aspects of order ethics which highlight the importance of rules, e.g. global rules for the financial markets. In this regard, order ethics (“Ordnungsethik”) is the complement of the (...) German conception of “Ordnungspolitik” which also stresses the importance of a regulatory framework. This framework is needed not to tame the market, but to make it more profitable in the long run. -/- The conception of order ethics relies heavily on contractarianism, especially on James Buchanan’s work. Unlike many other conceptions of ethics, it does not start with an aim to achieve, but rather with an account of what the social world – in which ethical norms have to be implemented – is like. Our social world is different from the pre-modern one. Pre-modern societies played zero-sum games in which people could only gain significantly at the expense of others. And the types of ethics that we are still used to today have been developed within these pre-modern societies. -/- Modern societies, by contrast, can be characterised – by economists and other social theorists alike – as societies with continuous growth. This growth has only been made possible by the modern competitive market economy which enables everyone to pursue his own interests within a carefully devised institutional system. In this system, positive sum games are played, which makes it in principle possible to improve the position of every individual at the same time. Most kinds of ethics, however, resulting from the conditions of pre-modern societies, ignore the possibility of win-win-situations and instead require us to be moderate, to share, to sacrifice, as this would have been functional in zero-sum games. These conceptions distinguish – in more or less strict ways – between self-interest and altruistic motivation. Self-interest, more often than not, is ultimately seen as something evil. -/- Such an ethics cannot be functional in modern societies. Ethical concepts lag behind. Within zero-sum games, it was necessary to call for temperance, for moderate profits, or for a condemnation of lending money at interest. Within positive-sum games, however, the morally desired result of a social process cannot be brought about by changes in motivation, by switching from ‘egoistic’ to ‘altruistic’ motivation. The second theoretical element introduced by order ethics is the distinction between actions and rules, which was already mentioned. Traditional ethics concerns actions: It calls directly for changes in behaviour. This is a consequence of pre-modern conditions as reconstructed before: People in the pre-modern world were only able to control their actions, not so much however the conditions of their actions. In particular, rules like laws, constitutions, social structures, the market order, and also ethical norms have remained stable for centuries. In modern societies, this situation has changed entirely. The rules governing our actions have increasingly come under our control. -/- In this situation, ethics has to focus on rules. Morality must be incorporated in incentive-compatible rules. Direct calls for changes in behaviour without changes in the rules lead only to an erosion of compliance with moral norms. Individuals that continue to behave ‘morally’ will be singled out, because the incentives have not been changed. Moral norms which are to be justified cannot require people to abstain from pursuing their own advantage. People abstain from taking ‘immoral’ advantages only if adherence to ethical norms yields greater benefits over the planned sequence of actions than defection in the single case. Thus ‘abstaining’ is not abstaining in the long run, it is rather an investment in expectations of long-term benefits. By adhering to ethical norms, I become a reliable partner for interactions. The norms do indeed constrain my actions, but they simultaneously expand my options in interactions. And people consent to rules only if these rules hold greater advantages for them, at least in the long run. -/- In general, ethics cannot require people to abandon their individual calculation of advantages. However, it may suggest improving one’s calculation, by calculating in the long run rather than in the short run, and by taking into account the interests of our fellows, as we depend on their acceptance for reaching an optimal level of well-being, especially in a globalized world full of interdependence. -/- The problem of implementation can now be placed at the beginning of a conception of order ethics, justified with reference to the conditions of modern societies I have sketched. Under the conditions of pre-modern societies, an ethics of temperance had evolved that posed simultaneously the problems of implementation and justification. The implementation of well-justified norms or standards could then be regarded as unproblematic, because the social structures allowed for a direct face-to-face enforcement of norms. Pre-modern societies not only favored an ethics of temperance, they also had the instrument of face-to-face-sanctions within their smaller and non-anonymous communities. This instrument is no longer functional in modern anonymous societies, and so we have to face up to the problem of implementation right at the start of our ethical conception. Simultaneously, an order ethics relies on the implementation of sanctions for enforcing incentive-compatible rules. In modern societies, rules and institutions, to a large extent, must fulfil the tasks that were, in pre-modern times, fulfilled by moral norms, which in turn were sanctioned by face-to-face sanctions. Norm implementation in modern societies thus works by setting adequate incentives in order to prevent the erosion of moral norms, which would happen if ‘moral’ actors were systematically threatened with exploitation by other, less ‘moral’ actors. -/- This conception of order ethics is then elaborated further in the area of business ethics. -/- . (shrink)

Driving light trucks creates the risk of significant harm to other people. Compared to regular cars, light trucks endanger the occupants of other vehicles more and have a markedly more negative impact on the environment. Consequently, many people who currently drive light trucks ought to switch to smaller vehicles.

In our daily lives, we continuously evaluate feedback information, update our knowledge, and adapt our behavior in order to reach desired goals. This ability to learn from feedback information, however, declines with age. Previous research has indicated that certain higher-level learning processes, such as feedback evaluation, integration of feedback information, and updating of knowledge, seem to be affected by age, and recent studies have shown how the adaption of choice behavior following feedback can differ with age. The neural mechanisms underlying (...) this age-related change in choice behavior during learning, however, remain unclear. The aim of this study is therefore to investigate the relation between learning-related neural processes and choice behavior during feedback learning in two age groups. Behavioral and fMRI data were collected, while a group of young and older adults performed a probabilistic learning task consisting of 10 blocks of 20 trials each. On each trial, the participants chose between a house and a face, after which they received visual feedback. In each block, either the house or the face image had a higher probability of yielding a reward. Participants were instructed to try to maximize their gains. Our results showed that less successful learning in older adults, as indicated by a lower learning rate, corresponded with a higher tendency to switch to the other stimulus option, and with a reduced adaptation of this switch choice behavior following positive feedback. At the neural level, activation following positive and negative feedback was found to be less distinctive in the older adults, due to a smaller feedback-evaluation response to positive feedback in this group. Furthermore, whereas young adults displayed increased levels of knowledge updating prior to adapting choice behavior, we did not find this effect in older adults. Together, our results suggest that diminished learning performance with age corresponds with diminished evaluation of positive feedback and reduced knowledge updating related to changes in choice behavior, indicating how such differences in feedback processing at the trial level in older adults might lead to reduced learning performance across trials. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Journal of the History of Philosophy 39.1 (2001) 139-141 [Access article in PDF] Helen S. Lang. The Order of Nature in Aristotle's Physics: Place and the Elements. Cambridge: Cambridge University Press, 1998. Pp. xii + 324. £40. This is an unsuccessful book. Some of the reasons for its failure are complex, others are more simple. I cannot address all, but shall simply discuss the fundamental claims about four large (...) topical units—about nature, place, void and elemental motion—indicating why they are untenable.Discussing the celebrated definition of nature in Physics II.1, Lang contends that in it the verb kineisthai should be taken in the passive voice, that nature should be understood as a principle or cause of being moved and of being at rest, and not just blandly as a principle of motion and rest. Since Aristotle asserts in Book VIII of the Physics that the elements contain a passive principle of motion (255b30f), Lang's contention would mean that the elements in this respect do not differ from other natural entities. This is highly unlikely, given the systematic contrast of self-moving composite natural entities and simple, unarticulated elemental natures at 255a5-18. Lang goes so far as to assert [End Page 139] that "kineisthai is always passive, not middle (or reflexive), in both Plato and Aristotle" (42). Fortunately, we need not accept this on her word: although kineisthai can be both passive and middle, in some instances (notably in aorist and future), passive and middle forms are different. Accordingly, Lang's claim must be rejected on the basis of the very first passage she helpfully quotes as an "additional example" in n.24 on p.42: Physics VII.1 242a37f employs the middle voice future, kinesétai, and not the passive form, kinethésetai. The passage, teeming with different forms of the verb kineisthai, describes an entity which contains the principle of motion in itself, which moves naturally. This indisputably shows that Lang's contention is wrong.Lang, contrary to the well-entrenched scholarly consensus, claims that place is not the first (=innermost) extremity or first unmoved boundary of the containing body, but the extremity of the first body, i.e., of the celestial sphere. (The transposition of the qualification "first" happens in several, non-conclusive installments, see e.g. 99f, or 106f.) This transposition, however, runs counter to several of Aristotle's stipulations about place. Lang's all-encompassing extremity can only be the common (koinos) place of everything there is, whereas Aristotle is keen on finding the proper or particular (idios) place, a location which contains nothing but the entity itself (209a32-b1). The entirety of the discussion in Physics IV.4-5 attests that it is this latter place which Aristotle defines here: the first place is neither smaller, nor bigger than the thing in place (211a1f, a23-29, a31-33, etc.). Aristotle repeatedly stresses that the extremities of the contained body and its container are "in the same" (211a33f, b11f). This remark surely would be out of place about the remote extremity of the first containing body. It is also repeatedly set out that the direction of explanation is bottom-up, and not top-down, as Lang's all-encompassing universal place would require: it is by being in a particular locus that we can be said to be in (the sphere of) air, and by this in the heaven (209a33-b1, 211a23-26).Lang's proposal is not just theoretically unappealing. The traditional should not be rejected recklessly, without an attentive discussion. After all, it "apparently beg[a]n immediately with Theophrastus," as Lang rather uncannily admits (105), and it was Theophrastus, and not Lang, who studied and worked for decades with Aristotle.A key assertion of the chapter on void also rests on a grave philological blunder. Lang argues that interpreters switched from Aristotle's expression "that through which" (to di' hou) to "medium," thereby surrendering the original net of notions, in which the natural activity of the element impeded the progression of the... (shrink)

John Searle and Susanna Siegel have argued that cases of aspect‐switching show that visual experience represents a richer range of properties than colours, shapes, positions and sizes. I respond that cases of aspect‐switching can be explained without holding that visual experience represents rich properties. I also argue that even if Searle and Siegel are right, and aspect‐switching does require visual experience to represent rich properties, there is reason to think those properties do not include natural‐kind properties, such as being a (...) tomato. (shrink)

Code switching is defined as the use of two or more languages or varieties of language in conversation. It is a general phenomenon in Pakistani society. This research was conducted through a qualitative descriptive method; it produces descriptive data in the form of code switched sentences from editorial of Urdu newspaper. In this research paper I discussed code switching in editorial of an Urdu newspaper. Daily Khabrain Newspaper was selected for this purpose. One week newspapers were collected for research from (...) 1st January, 2020 to 7th January, 2020 to analyze code switching in editorial. In this research paper I discussed code switching in editorial of an Urdu newspaper. Aims and Objectives are; in this research paper I discussed code switching in editorial of an Urdu newspaper. Research Question was what type of code switching is in editorial in Daily Khabrain Newspaper? Daily Khabrain Newspaper from first January 2020 to 7th January 2020 was collected for the analysis of language or code switching and its type in editorial. Through the analysis of data of newspaper it can be concluded that the type of code switching was intra sentential, word code switching and total integrated Urdu. (shrink)

An explicitly frame related interpretation of a very general more for less result is used to establish a correspondingly general class of frame related switching results. These are used in turn to show how preference reversals of kinds found by Allais and others may not only be essentially non-paradoxical in character, but can be expected to be frequently observed, even under conditions of certainty and of complete information.

The contentious question of bilingual processing cost may be recast as a fresh question of code-switching (CS) strategies—quantitative preferences and structural adjustments for switching at particular junctures of two languages. CS strategies are established by considering prosodic and syntactic variables, capitalizing here on bidirectional multi-word CS, spontaneously produced by members of a bilingual community in northern New Mexico who regularly use both languages (Torres Cacoullos and Travis, 2018). CS strategies become apparent by extending the equivalence constraint, which states that bilinguals (...) avoid CS at points of word placement conflict (Poplack, 1980), to examine points of inconsistent equivalence between the languages. Such sites of variable equivalence are junctures where the word strings of the two languages are equivalent only sometimes due to language-internal variable structures. A case in point for the English-Spanish language pair is the boundary between main and complement clauses, where a conjunction occurs always in Spanish but variably in English. The prosodic distancing strategy is to separate the juncture of the two languages. Here the complement clause appears in a different prosodic unit from the main clause, disproportionately as compared both with monolingual benchmarks and with bilinguals' own unilingual English and Spanish. Prosodic distancing serves to mitigate variable equivalence. The syntactic selection strategy is to opt for the variant that is more quantitatively available and more discourse neutral. Here the preference is for the Spanish complementizer que—regardless of main or complement clause language— which is the more frequent option in bilinguals' combined experience in both their languages, whereas English complementizer that is subject to a number of conditioning factors. Syntactic selection serves to restore equivalence at sites of variable equivalence. Discovery of community CS strategies may spur reconsideration of processing cost as a matter of relative difficulty, which will depend on bilinguals' prosodic and syntactic choices at particular CS sites. (shrink)

This article deals with an argument reported by Razi (d. 1210) that attempted to undermine the immaterialist position about human nature. After some introductory remarks and explanation of the conceptual background, the article analyses the structure of the argument, with special attention to the idea of soul-switching.’ Some comparisons are made between the argument reported by Razi and a number of arguments from modern and contemporary eras of philosophy. One section is devoted to the critique of the argument and its (...) conceptual basis. This article shows that the argument reported by Razi is a methodological antecedent of a family of contemporary epistemological arguments against substance dualism. It is also shown that discussion of the argument could be useful to highlight a weakness in some, but not all, versions of immaterialism about human nature. (shrink)

Theories of embodied cognition hold that the conceptual system uses perceptual simulations for the purposes of representation. A strong prediction is that perceptual phenomena should emerge in conceptual processing, and, in support, previous research has shown that switching modalities from one trial to the next incurs a processing cost during conceptual tasks. However, to date, such research has been limited by its reliance on the retrieval of familiar concepts. We therefore examined concept creation by asking participants to interpret modality-specific compound (...) phrases (i.e., conceptual combinations). Results show that modality switching costs emerge during the creation of new conceptual entities: People are slower to simulate a novel concept (e.g., auditory jingling onion) when their attention has already been engaged by a different modality in simulating a familiar concept (e.g., visual shiny penny). Furthermore, these costs cannot be accounted for by linguistic factors alone. Rather, our findings support the embodied view that concept creation, as well as retrieval, requires situated perceptual simulation. (shrink)

The attempt to model the structure of consciousness in split-brain subjects is ongoing. This paper concerns the recently proposed ?switch model? of split-brain consciousness, according to which a split-brain subject possesses only a single stream of consciousness, unified at and across time, that shifts from one hemisphere to the other from moment to moment. The paper argues that while the central explanatory element of the switch model may account for some aspects of split-brain consciousness, the best general picture (...) of split-brain consciousness is still offered by some version of the ?conscious duality model.? (shrink)

A fundamental property of emotional responses is a change in action tendencies that allow the individual to cope with the situation. Most basically, there are two types of behaviour one can switch to when responding emotionally: approach or withdrawal. The present study examined whether the ability to switch to approach or withdrawal depends on the type of behaviour shown before. Using familiar (Experiment 1) and unfamiliar (Experiment 2) neutral stimuli, we first show that switching from approach to withdrawal (...) is generally easier than vice versa. In Experiment 3, we demonstrate that this holds true even when participants respond to emotional stimuli that typically elicit strong approach or withdrawal tendencies. These results indicate that there is a fundamental asymmetry in the ability to switch from approach to withdrawal or vice versa. As shown in Experiment 3, this asymmetry may represent a serious confound in many previous studies examining the link between stimulus valence and associated action tendencies, suggesting that the link between positive stimuli and approach tendencies may be stronger, and the link between negative stimuli and withdrawal tendencies weaker, than previously believed. (shrink)

John Searle and Susanna Siegel have argued that cases of aspect‐switching show that visual experience represents a richer range of properties than colours, shapes, positions and sizes. I respond that cases of aspect‐switching can be explained without holding that visual experience represents rich properties. I also argue that even if Searle and Siegel are right, and aspect‐switching does require visual experience to represent rich properties, there is reason to think those properties do not include natural‐kind properties, such as being a (...) tomato. (shrink)

This article deals with an argument reported by Razi (d. 1210) that attempted to undermine the immaterialist position about human nature. After some introductory remarks and explanation of the conceptual background, the article analyses the structure of the argument, with special attention to the idea of soul-switching.’ Some comparisons are made between the argument reported by Razi and a number of arguments from modern and contemporary eras of philosophy. One section is devoted to the critique of the argument and its (...) conceptual basis. This article shows that the argument reported by Razi is a methodological antecedent of a family of contemporary epistemological arguments against substance dualism. It is also shown that discussion of the argument could be useful to highlight a weakness in some, but not all, versions of immaterialism about human nature. (shrink)

Inducing the rubber hand illusion (RHI) requires that participants look at an imitation hand while it is stroked in synchrony with their occluded biological hand. Previous explanations of the RHI have emphasized multisensory integration, and excluded higher cognitive functions. We investigated the relationship between the RHI and higher cognitive functions by experimentally testing task switch (as measured by switch cost) and mind wandering (as measured by SART score); we also included a questionnaire for attentional control that comprises two (...) subscales, attention-shift and attention-focus. To assess experience of RHI, the Botvinick and Cohen (1998) questionnaire was used and illusion onset time was recorded. Our results indicate that rapidity of onset reliably indicates illusion strength. Regression analysis revealed that participants evincing less switch cost and higher attention-shift scores had faster RHI onset times, and that those with higher attention-shift scores experienced the RHI more vividly. These results suggest that the multi-sensory hypothesis is not sufficient to explain the illusion: higher cognitive functions should be taken into account when explaining variation in the experience of ownership for the rubber hand. (shrink)

In this article, I draw on ethnographic research to show how a particular ethos and worldview get produced in the context of “technical” education in a department of nanoengineering. Building on feminist science studies and communication theory, I argue that the curriculum introducing undergraduate students to scale implicitly teaches them an abstract and universal notion that smaller is better. I suggest that rather than smaller is better, a perspective that embraces context and specificity—such as the question “when, how, (...) and for whom is smaller better?”—would ground nanoengineering in a more reflexive, pluralistic, and democratically oriented mode of world-building. (shrink)

Realists about group agency, according to whom corporate agents may have mental states and perform actions over and above those of their individual members, think that individual agents may switch between participating in individual and corporate agency. My aim is, however, to argue that the inescapability of individual agency spells out a difficulty for this kind of switching – and, therefore, for realism about corporate agency. To do so, I develop Korsgaard's notion of plight inescapability. On my take, it (...) suggests that individual agents are continuously faced with fully exercising their own individual agency (absent external limits at the time of its exercise). But then individual agents may not switch to acting as members of corporate agents, in the sense of taking on irreducible mental states that differ from their own. As it nevertheless is possible to participate fully in the action of a corporate entity, this incompatibility between individual and corporate mental states suggests a challenge for group agent realism. (shrink)

Based on content externalism, the question of whether self-knowledge is authoritative or not has launched a real controversy in the philosophy of mind. Boghossian proposed slow switching argument in defense of incompatibility of the two views. This argument has been criticized by some philosophers through different approaches. Vahid is one of them. He claimed that Boghossian's argument appeals to some controversial assumptions without which it cannot achieve its conclusion. In this article, I criticize Vahid's response to slow switching argument and (...) show that self-knowledge in Vahid's response differs in having authority and therefore in function from that of Boghossian. (shrink)

Recent models of the conceptual system hold that concepts are grounded in simulations of actual experiences with instances of those concepts in sensory-motor systems (e.g., Barsalou, 1999, 2003; Solomon & Barsalou, 2001). Studies supportive of such a viewhave shown that verifying a property of a concept in one modality, and then switching to verify a property of a different concept in a different modality generates temporal processing costs similar to the cost of switching modalities in perception. In addition to non-emotional (...) concepts, the present experiment investigated switching costs in verifying properties of positive and negative (emotional) concepts. Properties of emotional concepts were taken from vision, audition, and the affective system. Parallel to switching costs in neutral concepts, the study showed that for positive and negative concepts, verifying properties from different modalities produced processing costs such that reaction times were longer and error rates were higher. Importantly, this effect was observed when switching from the affective system to sensory modalities, and vice-versa. These results support the embodied cognition view of emotion in humans. (shrink)

Recent advancements in developmental biology enable the creation of embryo-like structures from human stem cells, which we refer to as human embryo-like structures (hELS). These structures provide promising tools to complement—and perhaps ultimately replace—the use of human embryos in clinical and fundamental research. But what if these hELS—when further improved—also have a claim to moral status? What would that imply for their research use? In this paper, we explore these questions in relation to the traditional answer as to why human (...) embryos should be given greater protection than other (non-)human cells: the so-called Argument from Potential (AfP). According to the AfP, human embryos deserve special moral status because they have the unique potential to develop into persons. While some take the development of hELS to challenge the very foundations of the AfP, the ongoing debate suggests that its dismissal would be premature. Since the AfP is a spectrum of views with different moral implications, it does not need to imply that research with human embryos or hELS that (may) have ‘active’ potential should be completely off-limits. However, the problem with determining active potential in hELS is that this depends on development passing through ‘potentiality switches’ about the precise coordinates of which we are still in the dark. As long as this epistemic uncertainty persists, extending embryo research regulations to research with specific types of hELS would amount to a form of regulative precaution that as such would require further justification. (shrink)

This article discusses xenotransplantation and examines the way its scientific promoters have defended their technology against potentially damaging public representations. The authors explore the criteria used to legitimate the selection of the pig as the best species from which to “harvest” transplant tissues in the future. The authors’ analysis shows that scientists and medical practitioners routinely switch between scientific and cultural repertoires. These repertoires enable such actors to exchange expert identities in scientific discourse for public identities in cultural discourse. (...) These discourses map onto similarities and differences between animal donors and human hosts. Finally, the case is used to comment on a number of related approaches where the dynamics of medical and scientific authority are discussed. (shrink)

Organisations that design and deploy artificial intelligence (AI) systems increasingly commit themselves to high-level, ethical principles. However, there still exists a gap between principles and practices in AI ethics. One major obstacle organisations face when attempting to operationalise AI Ethics is the lack of a well-defined material scope. Put differently, the question to which systems and processes AI ethics principles ought to apply remains unanswered. Of course, there exists no universally accepted definition of AI, and different systems pose different ethical (...) challenges. Nevertheless, pragmatic problem-solving demands that things should be sorted so that their grouping will promote successful actions for some specific end. In this article, we review and compare previous attempts to classify AI systems for the purpose of implementing AI governance in practice. We find that attempts to classify AI systems proposed in previous literature use one of three mental models: _the Switch_, i.e., a binary approach according to which systems either are or are not considered AI systems depending on their characteristics; _the Ladder_, i.e., a risk-based approach that classifies systems according to the ethical risks they pose; and _the Matrix_, i.e., a multi-dimensional classification of systems that take various aspects into account, such as context, input data, and decision-model. Each of these models for classifying AI systems comes with its own set of strengths and weaknesses. By conceptualising different ways of classifying AI systems into simple mental models, we hope to provide organisations that design, deploy, or regulate AI systems with the vocabulary needed to demarcate the material scope of their AI governance frameworks. (shrink)

Formal methods developed for modeling levels of selection problems have recently been applied to the investigation of major evolutionary transitions. We discuss two new tools of this kind. First, the ‘near-variant test’ can be used to compare the causal adequacy of predictively equivalent representations. Second, ‘state-variable gestalt-switching’ can be used to gain a useful dual perspective on evolutionary processes that involve both higher and lower level populations.

The use of more than one language in a literary text is called literary multilingualism. Ricci's trilogy presents this linguistic phenomenon as the author uses more than one linguistic code in the same text: English, Italian, and dialect. This work describes how code-switching becomes an important device of mimesis, representing not just a switching in language, but also a switch in culture, style, and in voice. This study demonstrates how Ricci exploited his linguistic richness on a literary level creating (...) novels that present the Italian world in a realistic way, but at the same time making use of linguistic varieties as literary device. (shrink)

Le présent article étudie la syntaxe des structures langagières mixtes en basque-espagnol à partir d’observations de situations d’interaction entre adulte et enfant(s), réalisées aussi bien dans le cadre d’études longitudinales que transversales. L’objectif de la contribution est double. Elle vise, d’une part, le développement d’une typologie d’exemples de code switching (CS) permettant de délimiter le corpus adéquat pour tester différentes hypothèses relatives à la grammaire du CS (Jake et al. 2005, MacSwam 2005, 2008, Liceras et al. 2005, 2008). D’autre part, (...) la quantification des données permet un approfondissement des connaissances sur le phénomène du CS dans des productions précoces. Elle incite à relativiser l’importance des énoncés mixtes comme indicateurs d’une majeure ou mineure compétence grammaticale des enfants bilingues dans le cadre de productions langagières (L1 et L2) en situation de communication habituelle avec d’autres partenaires enfants et adultes. (shrink)

Deciphering how DCAFs (DDB1‐CUL4 Associated Factors) modulate a broad spectrum of cellular processes, including cell cycle progression and maintenance of genomic integrity is critical to better understand cellular homeostasis and diseases. Cells contain more than 100 DCAFs that associate with the Cullin‐Ring Ubiquitin Ligase 4 (CRL4) complex that target specific protein substrates for degradation. DCAFs are thought to act as substrate receptors that dictate the specificity of the ubiquitination machinery (“catalytic DCAFs”). However, recent studies have suggested that some DCAFs might (...) play a different role by targeting CRL4 complexes to distinct cellular compartments (“structural DCAFs”). Once localized to their correct cellular domains, these CRLs dissociate from the structural DCAFs prior to their association with other, substrate‐specific catalytic DCAFs. Thus, we propose that DCAF switches can provide a mechanistic basis for the degradation of proteins that regulate cell growth and proliferation at precise points in space and time. (shrink)

Recent models of the conceptual system hold that concepts are grounded in simulations of actual experiences with instances of those concepts in sensory-motor systems (e.g., Barsalou, 1999, 2003; Solomon & Barsalou, 2001). Studies supportive of such a viewhave shown that verifying a property of a concept in one modality, and then switching to verify a property of a different concept in a different modality generates temporal processing costs similar to the cost of switching modalities in perception. In addition to non-emotional (...) concepts, the present experiment investigated switching costs in verifying properties of positive and negative (emotional) concepts. Properties of emotional concepts were taken from vision, audition, and the affective system. Parallel to switching costs in neutral concepts, the study showed that for positive and negative concepts, verifying properties from different modalities produced processing costs such that reaction times were longer and error rates were higher. Importantly, this effect was observed when switching from the affective system to sensory modalities, and vice-versa. These results support the embodied cognition view of emotion in humans. (shrink)

This essay is about a special kind of transformative choice that plays a key role in debates about permissivism, the view that some bodies of evidence permit more than one rational response. A prominent objection to this view contends that its defender cannot vindicate our aversion to arbitrarily switching between belief states in the absence of any new evidence. A prominent response to that objection tries to provide the desired vindication by appealing to the idea that arbitrary switching would involve (...) a special kind of transformative choice: the choice to change one’s epistemic standards, i.e., one’s commitments regarding the relative importance of achieving true belief and avoiding false belief. My first aims here are to argue that this response is unsuccessful and propose an alternative. My secondary aim is to consider how this discussion might bear on more general debates about transformative choice. (shrink)

Half a century into the digital era, the profound impact of information technology on intellectual and cultural life is universally acknowledged but still poorly understood. The sheer complexity of the technology coupled with the rapid pace of change makes it increasingly difficult to establish common ground and to promote thoughtful discussion. Responding to this challenge, _Switching Codes _brings together leading American and European scholars, scientists, and artists—including Charles Bernstein, Ian Foster, Bruno Latour, Alan Liu, and Richard Powers—to consider how the (...) precipitous growth of digital information and its associated technologies are transforming the ways we think and act. Employing a wide range of forms, including essay, dialogue, short fiction, and game design, this book aims to model and foster discussion between IT specialists, who typically have scant training in the humanities or traditional arts, and scholars and artists, who often understand little about the technologies that are so radically transforming their fields. _Switching Codes_ will be an indispensable volume for anyone seeking to understand the impact of digital technology on contemporary culture, including scientists, educators, policymakers, and artists, alike. (shrink)

This study investigates switching costs in landmark-based wayfinding using olfactory and visual landmark information. It has already been demonstrated that there seem to be no switching costs, in terms of correct route decisions, when switching between acoustically and visually presented landmarks. Olfaction, on the other hand, is not extensively focused on in landmark-based wayfinding thus far, especially with respect to modality switching. The goal of this work is to empirically test and compare visual and olfactory landmark information with regard to (...) their suitability for wayfinding including a modality switch. To investigate this, an experiment within a virtual environment was conducted in which participants were walked along a virtual route of 12 intersections. At each intersection, landmark information together with directional information was presented, which was to be memorized and recalled in the following phase, either in the same or in the other modality. The results of the study show that, in contrast to the no-switching costs between auditory and visual landmarks in previous studies, switching costs occur when switching modality from visual to olfactory and vice versa. This is indicated by both longer decision times and fewer correct decisions. This means that a modality switch involving olfactory landmark information is possible but could lead to poorer performance. Therefore, olfaction may still be valuable for landmark-based-wayfinding. We argue that the poorer performance in the switching-condition is possibly due to higher cognitive load and the separate initial processing of odors and images in different cognitive systems. (shrink)

It has been proposed that processing sentential negation recruits the neural network of inhibitory control. In addition, inhibition mechanisms also play a role in switching languages for bilinguals. Since both processes may share inhibitory resources, the current study explored for the first time whether and how language-switching influences the processing of negation. To this end, two groups of Spanish-English bilinguals participated in an encoding-verification memory task. They read short stories involving the same two protagonists, referring to their activities in four (...) different scenarios in Spanish or English. Following each story, the participants received verification questions requiring “yes” or “no” responses depending on whether a given fact was correctly referred to one of the protagonists. Some of the verification questions were in the story’s original language and others in the alternate language. Results revealed that language-switching facilitated negative responses compared to affirmative responses, exclusively for questions switching from dominant language to non-dominant language. This effect might reflect that the domain-general mechanisms of inhibitory control are recruited at least partially for both language switch and negation process simultaneously, although this phenomenon is modulated by language dominance. (shrink)

This study proposes a novel fractional-order sliding-mode control strategy with robust switching gain to achieve reliable and high quality of wind-powered microgrid systems. Three fractional-order sliding mode controllers are designed to generate continuous control signals and regulate the outer DC-link voltage loop and inner current loop in the grid-side inverters. High robustness and stability of the grid-side inverter can be guaranteed even in the presence of parameter variations and external disturbances. Owing to the fractional-order sliding manifold and fractional-order integral control (...) law, the chattering is attenuated. The fractional-order robust adaptive switching gain is designed to avoid overestimating the upper bound of matched/unmatched uncertainties, save the control energy, and guarantee the rapidity and robustness of the convergence. Simulations validate the proposed method. (shrink)