Skin pigment pattern formation is a paradigmatic example of pattern formation. In zebrafish, the adult body stripes are generated by coordinated rearrangement of three distinct pigment cell‐types, black melanocytes, shiny iridophores and yellow xanthophores. A stem cell origin of melanocytes and iridophores has been proposed although the potency of those stem cells has remained unclear. Xanthophores, however, seemed to originate predominantly from proliferation of embryonic xanthophores. Now, data from Singh et al. shows that all three cell‐types derive from shared stem (...) cells, and that these cells generate peripheral neural cell‐types too. Furthermore, clonal compositions are best explained by a progressive fate restriction model generating the individual cell‐types. The numbers of adult pigment stem cells associated with the dorsal root ganglia remain low, but progenitor numbers increase significantly during larval development up to metamorphosis, likely via production of partially restricted progenitors on the spinal nerves. (shrink)

Most psychological literature on gaslighting focuses on it as a dyadic phenomenon occurring primarily in marriage and family relationships. In my analysis, I will extend recent fruitful philosophical engagement with gaslighting by arguing that gaslighting, particularly gaslighting that occurs in more public spaces like the workplace, relies upon external reinforcement for its success. I will ground this study in an analysis of the film Gaslight, for which the phenomenon is named, and in the course of the analysis will focus on (...) a paradox of this kind of gaslighting: it wreaks significant epistemic and moral damages largely through small, often invisible actions that have power through their accumulation and reinforcement. (shrink)

This dissertation is an attempt to loosen what I see as a chokehold by which two paramount assumptions constrict our epistemic endeavors. These Enlightenment assumptions--that we accept or refute ideas as true based on transparently clear and orderly methods and criteria, and that individuals accept or refute truth claims--are still central in epistemology, despite their many critics . Thinking about gossip as an epistemologically productive concept provides us with the means to critique those assumptions, and further attempts to broaden our (...) notion of an epistemological foundation. ;Gossip at first appears to be an unlikely candidate for such a resurrection, mainly because its treatment by academics has been dismissive; this dismissal is in part due to Enlightenment conceptions about truth and falsehood. Chapter One surveys the social science literature on gossip and rumor, revealing that social scientists begin with such restrictive definitions of what gossip is that their conclusions amount to little more than tautology. Chapter Two shows that humanists have a slightly different approach to gossip, but with roughly similar results. ;The handful of philosophers who deal directly with gossip or rumor almost as a unit accept uncritically a division between "purposive" conversation and "idle" chatter. To do so, I think, perpetuates a limiting epistemic foundation on a linguistic level. In contrast, I argue in Chapter Three that the very existence of something like gossip proves the inadequacy of the foundationalist myth , and that to attempt to understand and use gossip with foundationalist tools is simply a wrong fit. My understanding of gossip is based on this central fact: we undertake the activity of gossip or rumor-spreading because we are trying to make sense out of something--we need to collect knowledge socially. Gossip originates from dissonance; it acts as a counterweight to more official information, and can't be considered apart from official knowledge. We use gossip and rumor, along with more orthodox sources of information, to formulate our understanding of ourselves and the world around us. The extent to which gossip and rumor are spread is the extent to which the analysis is shared, and not individualized. Gossip is both a genealogical tool and an speculative tool. (shrink)

Most psychological literature on gaslighting focuses on it as a dyadic phenomenon occurring primarily in marriage and family relationships. In my analysis, I will extend recent fruitful philosophical engagement with gaslighting (Abramson, “Turning up the Lights on Gaslighting” [2014]; McKinnon, “Allies Behaving Badly: Gaslighting as Epistemic Injustice” [2017]; Ruiz, “Spectral Phenomenologies” [2014]) by arguing that gaslighting, particularly gaslighting that occurs in more public spaces like the workplace, relies upon external reinforcement for its success. I will ground this study in an (...) analysis of the film Gaslight, for which the phenomenon is named, and in the course of the analysis will focus on a paradox of this kind of gaslighting: it wreaks significant epistemic and moral damages largely through small, often invisible actions that have power through their accumulation and reinforcement. (shrink)

Most psychological literature on gaslighting focuses on it as a dyadic phenomenon occurring primarily in marriage and family relationships. In my analysis, I will extend recent fruitful philosophical engagement with gaslighting by arguing that gaslighting, particularly gaslighting that occurs in more public spaces like the workplace, relies upon external reinforcement for its success. I will ground this study in an analysis of the film Gaslight, for which the phenomenon is named, and in the course of the analysis will focus on (...) a paradox of this kind of gaslighting: it wreaks significant epistemic and moral damages largely through small, often invisible actions that have power through their accumulation and reinforcement. (shrink)

Widespread concerns about the long-term fiscal gap in Social Security have prompted various proposals for structural reform, with individual accounts as the centerpiece. Carving out individual accounts from the existing system would shift significant risks and responsibilities to individual workers. A parallel development has already occurred in the area of private pensions. Experience with 401 plans indicates that many workers will have difficulty making prudent decisions concerning investment and withdrawal of funds. Moreover, in implementing any system of voluntary individual accounts, (...) it will be important to design default settings that provide appropriate guidance for workers with heterogeneous levels of financial sophistication and risk tolerance. The central goal of Social Security reform should be to close the fiscal gap in a way that preserves rather than undermines the existing system of mandatory defined benefits for all workers. (shrink)

A striking and unexplained feature of granulomatous inflammation is its anatomical association with the lymphatic system. Accumulating evidence suggests that lymphatic tracks and granulomas may alter the function of each other. The formation of new lymphatics, or lymphangiogenesis, is an adaptive response to tumor formation, infection, and wound healing. Granulomas also may induce lymphangiogenesis which, through a variety of mechanisms, could contribute to disease outcomes in tuberculosis and sarcoidosis. On the other hand, alterations in lymph node function and lymphatic draining (...) may be primary events which attenuate the risk and severity of granulomatous inflammation. This review begins with an introduction of granulomatous inflammation and the lymphatic system. A role of the lymphatic system in tuberculosis and sarcoidosis is then hypothesized. With a focus on lymphangiogenesis in these diseases, and on the potential for this process to promote dissemination, parallels are established with the well‐established role of lymphangiogenesis in tumor biology. (shrink)

Physicians and medical institutions in the United States are placing increasing emphasis on providing culturally sensitive care for patients, such as implementing a Confucian family-based model of medical decision making when caring for elderly Chinese patients. In this article, I articulate various reasons why deferring to the family is not a guarantee of culturally sensitive care, particularly when family members are first-generation Chinese-Americans. Nonetheless, I offer several suggestions to help physicians, medical institutions, and family members to provide more culturally sensitive (...) care for elderly Chinese patients. (shrink)

Candrakīrti is known for his commentaries on the major works of Nāgārjuna and Āryadeva. This chapter examines how Candrakīrti uses language and logic to undermine people's confidence in cherished beliefs about a self and point them towards the Buddha's path and its goal the peace of nirvana that transcends the limitations of language and logic. Candrakīrti first sets out his view on the two truths in the Madhyamakāvatāra. He associates both truths with the soteriological goal of Nāgārjuna's path: the peaceful (...) state of nirvana. Madhyamaka teaching amounts to nihilism. Candrakīrti responds that the charge of nihilism is wrong because there is no repudiation of moral actions. Emptiness is also related to the concept of intrinsic nature, and Candrakīrti uses this term in more than one sense. (shrink)

Titles and abstracts for the Pitt-London Workshop in the Philosophy of Biology and Neuroscience: September 2001.

There are growing concerns that increased screen device usage may have a detrimental impact on classroom behaviour and attentional focus. The consequences of screen use on child cognitive functioning have been relatively under-studied, and results remain largely inconsistent. Screen usage may displace the time usually spent asleep. The aim of this study was to examine associations between screen use, behavioural inattention and sustained attention control, and the potential modifying role of sleep. The relations between screen use, behavioural inattention, sustained attention (...) and sleep were investigated in 162 6- to 8-year-old children, using parent-reported daily screen use, the SWAN ADHD behaviour rating scale, The sustained attention to response task and the children’s sleep habits questionnaire. Tablet use was associated with better sustained attention performance but was not associated with classroom behavioural inattention. Shorter sleep duration was associated with poorer behavioural inattention and sustained attention. Sleep quality and duration did not act as mediators between screen usage and behavioural inattention nor sustained attention control. These findings suggest that careful management of the amount of time spent on electronic screen devices could have a beneficial cognitive impact on young children. The results also highlight the critical role of sleep in enhancing both behavioural attention and sustained attention, which are essential for supporting cognitive development and learning. (shrink)

Although prior work on ethical decision-making has examined the direct impact of magnitude of consequences as well as the direct impact of emotions on ethical judgments, the current research examines the interaction of these two constructs. Building on previous research finding disgust to have a varying impact on ethical judgments depending on the specific behavior being evaluated, we investigate how disgust, as well as happiness and sadness, moderates the effect of magnitude of consequences on an individual’s judgments of another person’s (...) unethical behavior. Specifically, we propose and find that because disgust and happiness are both associated with more heuristic-based processing, they both lead to a stronger reliance on the magnitude of consequences when forming ethical judgments. In contrast, because sad and neutral emotional states are associated with more systematic processing, they both result in a weaker reliance on the magnitude of consequences. As such, the effect of magnitude of consequences on judgments of unethical behaviors is stronger when individuals making the judgments are experiencing disgust or happiness versus sadness or a neutral state. This research shows that ethical judgment severity is contingent on individual-level factors, particularly the current emotional state being experienced by the individual, interacting with magnitude of consequences to impact the ethical decision-making process. (shrink)

The counseling process involves attention, emotional perception, cognitive appraisal, and decision-making. This study aimed to investigate cognitive appraisal and the associated emotional processes when reading short therapists' statements of motivational interviewing (MI). Thirty participants with work injuries were classified into the pre-contemplation (PC,n= 15) or readiness stage of the change group (RD,n= 15). The participants viewed MI congruent (MI-C), MI incongruent (MI-INC), or control phrases during which their electroencephalograms were captured. The results indicated significant Group × Condition effects in the (...) frontally oriented late positive complex (P600/LPC). The P600/LPC's amplitudes were more positive-going in the PC than in the RD group for the MI congruent statements. Within the PC group, the amplitudes of the N400 were significantly correlated (r= 0.607–0.649) with the participants' level of negative affect. Our findings suggest that the brief contents of MI statements alone can elicit late cognitive and emotional appraisal processes beyond semantic processing. (shrink)

Within the realm of nano-, bio-, info- and cogno- (or NBIC) technosciences, the ‘power to change the world’ is often invoked. One could dismiss such formulations as ‘purely rhetorical’, interpret them as rhetorical and self-fulfilling or view them as an adequate depiction of one of the fundamental characteristics of technoscience. In the latter case, a very specific nexus between science and technology, or, the epistemic and the constructionist realm is envisioned. The following paper focuses on this nexus drawing on theoretical (...) conceptions as well as empirical material. It presents an overview of different technoscientific ways to ‘change the world’—via contemplation and representation, intervention and control, engineering, construction and creation. It further argues that the hybrid character of technoscience makes it difficult (if not impossible) to separate knowledge production from real world interventions and challenges current science and technology policy approaches in fundamental ways. (shrink)

In matters of governance, is believing subject to ethical standards? If so, what are the criteria how relevant are they in our personal and political culture today? The really important matters in politics and governance necessitate a confidence that our beliefs will lead dependably to predictable and verifiable outcomes. Accordingly, it is unethical to hold a belief that is founded on insufficient evidence or based on hearsay or blind acceptance. In this paper, we demonstrate that the pragmatist concept of truth (...) best meets this standard for ethically held belief in matters of politics and governance. Currently, these standards are abused by the gaslighting and distortion characteristics of the often social media driven ‘misinformation society’. The legitimacy and trust in our institutions and leadership that is requisite for good governance is challenged thereby, threatening the viability of our republic. (shrink)

The article focuses on stories and storytelling practices as explanatory resources in standardization processes. It draws upon an ethnographic study of the development of a technical standard for data sharing in an ecological research community, where participants struggle to articulate the difficulties encountered in implementing the standard. Building from C. Wright Mills’ classic distinction between private troubles and public issues, the authors follow the development of a story as it comes to assist in transforming individual troubles in standard implementation into (...) an institutional issue for the ecological scientific community. The authors present the “hands-on” social science collaboration in this study as an example of a mechanism for supporting institutionalization of issues. Finally, the authors argue that narratives can serve as effective organizing principles within institutional settings, thereby providing an approach to understand the practical, substantive difficulties that occur in work with data in the sciences. (shrink)

Current work in experimental biology revolves around a handful of animal species. Studying only a few organisms limits science to the answers that those organisms can provide. Nature has given us an overwhelming diversity of animals to study, and recent technological advances have greatly accelerated the ability to generate genetic and genomic tools to develop model organisms for research on host–microbe interactions. With the help of such models the authors therefore hope to construct a more complete picture of the mechanisms (...) that underlie crucial interactions in a given metaorganism (entity consisting of a eukaryotic host with all its associated microbial partners). As reviewed here, new knowledge of the diversity of host–microbe interactions found across the animal kingdom will provide new insights into how animals develop, evolve, and succumb to the disease. (shrink)

Learning to map words onto their referents is difficult, because there are multiple possibilities for forming these mappings. Cross-situational learning studies have shown that word-object mappings can be learned across multiple situations, as can verbs when presented in a syntactic context. However, these previous studies have presented either nouns or verbs in ambiguous contexts and thus bypass much of the complexity of multiple grammatical categories in speech. We show that noun word learning in adults is robust when objects are moving, (...) and that verbs can also be learned from similar scenes without additional syntactic information. Furthermore, we show that both nouns and verbs can be acquired simultaneously, thus resolving category-level as well as individual word-level ambiguity. However, nouns were learned more quickly than verbs, and we discuss this in light of previous studies investigating the noun advantage in word learning. (shrink)

Book reviewed in this article: Coping with Genetic Disorders. By John C. Fletcher. Genetics, Ethics and Parenthood. Edited by Karen Lebacqz. Screening and Counseling for Genetic Conditions: The Ethical, Social, and Legal Implications of Genetic Screening, Counseling, and Education Programs. A report of the President's Commission for the Study of Ethical Problems in Medicine and Biomedical and Behavioral Research.

Standards of reasonability play an important role in some of the most difficult cases of rape. In recent years, the notion of the reasonable person has supplanted the historical concept of the reasonable man as the test of reasonability. Contemporary feminist critics like Catharine MacKinnon and Kim Lane Scheppele have challenged the notion of the reasonable person on the grounds that reasonability standards are gendered to the ground and so, in practice, the reasonable person is just the reasonable man in (...) a gender neutral guise. These critics call for the explicit employment of a reasonable woman standard for application to the actions of female victims of rape. But the arguments for abandoning a gender-neutral standard are double-edged and the employment of gendered standards of reasonability is likely to have implications that are neither foreseen by, nor acceptable to, advocates of such standards. Reasonable agent standards can be dropped, in favor of appeals to the notion of a reasonable demand by the law. However, if reasonable agent standards are to be retained, gendered versions of such standards are not preferable to gender-neutral ones. (shrink)

8 March, now known as International Women’s Day, is a day for feminist claims where demonstrations are organized in over 150 countries, with the participation of millions of women all around the world. These demonstrations can be viewed as collective rituals and thus focus attention on the processes that facilitate different psychosocial effects. This work aims to explore the mechanisms involved in participation in the demonstrations of 8 March 2020, collective and ritualized feminist actions, and their correlates associated with personal (...) well-being and collective well-being, collective efficacy and collective growth, and behavioral intention to support the fight for women’s rights. To this end, a cross-cultural study was conducted with the participation of 2,854 people from countries in Latin America and Europe, with a retrospective correlational cross-sectional design and a convenience sample. Participants were divided between demonstration participants and non-demonstrators or followers who monitored participants through the media and social networks. Compared with non-demonstrators and with males, female and non-binary gender respondents had greater scores in mechanisms and criterion variables. Further random-effects model meta-analyses revealed that the perceived emotional synchrony was consistently associated with more proximal mechanisms, as well as with criterion variables. Finally, sequential moderation analyses showed that proposed mechanisms successfully mediated the effects of participation on every criterion variable. These results indicate that participation in 8M marches and demonstrations can be analyzed through the literature on collective rituals. As such, collective participation implies positive outcomes both individually and collectively, which are further reinforced through key psychological mechanisms, in line with a Durkheimian approach to collective rituals. (shrink)

Openness and transparency are becoming hallmarks of responsible data practice in science and governance. Concerns about data falsification, erroneous analysis, and misleading presentation of research results have recently strengthened the call for new procedures that ensure public accountability for data-driven decisions. Though we generally count ourselves in favor of increased transparency in data practice, this Commentary highlights a caveat. We suggest that legislative efforts that invoke the language of data transparency can sometimes function as “Trojan Horses” through which other political (...) goals are pursued. Framing these maneuvers in the language of transparency can be strategic, because approaches that emphasize open access to data carry tremendous appeal, particularly in current political and technological contexts. We illustrate our argument through two examples of pro-transparency policy efforts, one historical and one current: industry-backed “sound science” initiatives in the 1990s, and contemporary legislative efforts to open environmental data to public inspection. Rules that exist mainly to impede science-based policy processes weaponize the concept of data transparency. The discussion illustrates that, much as Big Data itself requires critical assessment, the processes and principles that attend it—like transparency—also carry political valence, and, as such, warrant careful analysis. (shrink)

Alterations to cognitive function are often reported with depression and anxiety symptoms, yet few studies have examined the same associations with mental well-being. This study examined the association between mental well-being, depression and anxiety symptoms and cognitive function in 1502 healthy adult monozygotic and dizygotic twins, and the shared/unique contribution of genetic and environmental variance. Using linear mixed models, mental well-being was positively associated with sustained attention, inhibition, cognitive flexibility, motor coordination and working memory, whereas depression and anxiety symptoms were (...) associated with poorer sustained attention, inhibition, cognitive flexibility and executive function. Bivariate twin modelling showed well-being shared a small environmental correlation with motor coordination and a small genetic correlation with working memory. Trivariate twin modelling showed well-being shared a small genetic correlation with inhibition, whereas depression and anxiety symptoms shared a small environmental correlation with inhibition. The remaining variance was mostly driven by unique G and/or E variance. Overall, well-being and depression and anxiety symptoms show both independent and shared relationships with cognitive functions but this is largely attributable to unique G or E variance and small shared G/E variance between pairs of variables. (shrink)

Journal editorials, career features, and the popular press commonly talk of a graduate student mental health crisis. To date, studies on graduate student mental health have employed cross-sectional designs, limiting any causal conclusions regarding the relationship between entry into graduate study and mental health. Here, we draw on data from a longitudinal study of undergraduate students in Aotearoa New Zealand, allowing us to compare participants who did, and did not, transition into PhD study following the completion of their undergraduate degree. (...) Using multilevel Bayesian regression, we identified a difference in mental wellbeing between those who entered PhD study and those who did not. This difference, however, was largely due to those not entering PhD study displaying an increase in mental wellbeing. Participants that entered PhD study displayed a small decrease in mental wellbeing, with the posterior distribution of the simple effect heavily overlapping zero. This latter finding was orders of magnitude smaller than one might expect based on previous cross-sectional research and provides an important message; that a marked drop in mental health is not an inevitable consequence of entering graduate study. (shrink)