Georg Simon Ohm's work in the field of electricity led to what is now considered to be the most fundamental law of electrical circuits, Ohm's Law. Much less known is that only months earlier, Ohm had published another law—one that differed significantly from the now accepted one. The latter entailed a logarithmic relation between the length of the conductor and a parameter that Ohm called “loss of force.” This paper discusses how Ohm came up with an initial law that he (...) felt compelled to correct a few months later. We analyze Ohm's publication as well as his laboratory notes, relating them to our own laboratory experiences while using the replication method to study his work. We also discuss the conceptual background of Ohm's work. We conclude that he was significantly influenced by French studies in the field of electricity, most notably the ones by Charles Augustin Coulomb. (shrink)

This paper investigates how reports concerning a given country’s prospects affect investment decisions in two stylized, artificial organizational settings. We designed a role-game laboratory experiment, where subjects were asked to make investment decisions for two types of fictitious companies from the same country. We found that when available reports included positive country prospects, subjects strategized more on investments regardless of the characteristics of their organization. When reports included negative prospects, however, certain organizational peculiarities influenced the subjects’ interpretations, with (...) decision-makers opting for more prudent plans when managing a more traditional company. Cognitive maps of decision makers showed that subjects considered investment strategies as a means to fulfil a company’s role expectations regarding appropriate decisions. Notwithstanding all caveats due to the artificial and simplified nature of our experimental setting, our findings indicate the need for more research on the effect of reports and prospect analysis on strategic decisions of companies, especially when business prospects are uncertain. (shrink)

Evidence on the coherence between emotion and facial expression in adults from laboratory experiments is reviewed. High coherence has been found in several studies between amusement and smiling; low to moderate coherence between other positive emotions and smiling. The available evidence for surprise and disgust suggests that these emotions are accompanied by their “traditional” facial expressions, and even components of these expressions, only in a minority of cases. Evidence concerning sadness, anger, and fear is very limited. For sadness, one (...) study suggests that high emotion–expression coherence may exist in specific situations, whereas for anger and fear, the evidence points to low coherence. Insufficient emotion intensity and inhibition of facial expressions seem unable to account for the observed dissociations between emotion and facial expression. (shrink)

This paper reports the results of an economic lab experiment designed to test the impact of Basic Income (BI) on wages and productivity. The experimental design is based on the classic gift exchange game. Participants assigned the role of employer were tasked with making wage offers, and those assigned as employees chose how hard they would work in return. In addition to a control without any social security net, BI was compared to unemployment benefits, and both types of cash (...) transfers were tested at two levels. The results are that wage offers were increased in both the BI and unemployment benefit treatments compared to the control. The higher-level BI treatment also significantly increased effort. Further experimentation could shed more light on how the potential extra value created in the labor market through increased productivity would be divided between employers and employees. (shrink)

We discuss recent work on bounded rationality and learning in relation to Soros' principle of reflexivity and stress the empirical importance of non-rational, almost self-fulfilling equilibria in positive feedback systems. As an empirical example, we discuss a behavioral asset pricing model with heterogeneous expectations. Bubble and crash dynamics is triggered by shocks to fundamentals and amplified by agents switching endogenously between a mean-reverting fundamental rule and a trend-following rule, based upon their relative performance. We also discuss learning-to-forecast laboratory experiments, (...) showing that in positive feedback systems individuals coordinate expectations on non-rational, almost self-fulfilling equilibria with persistent price fluctuations very different from rational equilibria. Economic policy analysis may benefit enormously by focusing on efficiency and welfare gains in correcting mispricing along almost self-fulfilling equilibria. (shrink)

Increasing rates of obesity have fueled interest in the factors underlying food choice. While epidemiological studies report that disadvantaged social groups exhibit a higher incidence of obesity, causal evidence for an effect of social contexts on food choice remains scarce. To further our knowledge, we experimentally investigated the effect of disadvantageous social context on food choice in healthy, non-dieting participants. We used three established experimental methods to generate social contexts of different valence in controlled laboratory settings: (i) receiving varying (...) amounts of money in a Dictator Game (DG; n = 40), (ii) being included or excluded in a Cyberball Game (CBG; n = 35), and (iii) performing well, average, or poorly in a response time ranking task (RTR; n = 81). Following exposure to a particular social context, participants made pairwise choices between food items that involved a conflict between perceived taste and health attributes. In line with previous research, stronger dispositional self-control, greater cognitive control of eating behavior, and lower external eating (all assessed via questionnaires) were associated with healthier food choices. As expected, being treated unfairly in the DG, being excluded in the CBG, and performing poorly in the RTR led to negative emotions. However, we did not find an effect of the induced social context on food choice in any of the experiments, even when taking into account individual differences in participants' responses to the social context. Our results suggest that-at least in controlled laboratory environments-the influence of disadvantageous social contexts on food choice is limited. (shrink)

We use a lab experiment to examine whether and how leaders influence workers’ (un)ethical behavior through financial reporting choices. We randomly assign the role of leaders or workers to subjects, who can choose to report an outcome via automatic or self-reporting. Self-reporting allows for profitable and undetectable earnings manipulation. We vary the leaders’ ability to choose the reporting method and to punish workers. We show that workers are more likely to choose automatic reporting when their leader voluntarily does so (...) and can assign punishment. Even workers who choose self-reporting tend to cheat less when their leader chooses automatic reporting. Nonetheless, most leaders do not opt for automatic reporting in the first place: they often choose self-reporting and punish workers who rather choose automatic reporting. Collectively, our results reveal a dual effect of leadership on ethical behaviors in organizations: workers behave more ethically if their leader makes ethical choices, but often leaders do not make ethical choices in the first place. Hence, leading by example can backfire. (shrink)

Résumé Les questions d’échelle ont donné lieu à une large réflexion s’agissant de la modélisation et de l’expérimentation des systèmes physiques, mais elles n’ont pas été discutées dans le cadre des expériences économiques. Dans cet article, on distingue deux sortes d’expériences, les expériences « génériques » et « spécifiques ». Développant une comparaison entre deux études expérimentales en laboratoire portant sur l’« effet des prix postés », on montre que les questions d’échelle deviennent importantes dans les expériences spécifiques en raison (...) de la réduction aux dimensions du laboratoire de l’échelle de temps propre au marché cible. Cela impose des choix dans la configuration matérielle de l’expérience comme des changements de rôle pour les sujets expérimentaux. Notre discussion, donc, s’inscrit au sein de la littérature récente sur la validité externe et la matérialité des expériences. JEL Classification : B41, C90, L92, L98. (shrink)

In light of the so-called ‘chaos theorems’ from social choice theory, William Riker argues that the indeterminacy of majority rule leads to voting cycles making democratic decisions arbitrary and meaningless. Moreover, when the core is empty, majority instability correlates with the level of conflict among actors. This study uses laboratory committee decision-making experiments to provide an empirical test of both aspects of Riker’s argument. Committees make repeated majority decisions over 20 periods picking points from a two-dimensional policy space. The (...) experiment manipulates committee members’ preferences and thus varies the existence of a core and the level of conflict between group members. The experimental results contradict Riker’s interpretation of the chaos theorems’ implications. Thus, the core exhibits less attraction than generally assumed. Moreover, an empty core is not associated with increased majority rule instability. Instead, conflicting preferences lead to more instability irrespective of the existence of an equilibrium. (shrink)

Abstract We use a controlled laboratory experiment design to test rational choice theory on student whistleblowing. We examine reporting costs by comparing actual reporting behavior under anonymous and non-anonymous reporting channels. Reporting benefits are explored by considering the influence on reporting of group versus individual reward systems. We find that the type of reporting channel does not significantly influence student reporting behavior. Rewarding students based on group test scores results in significantly higher reporting rates compared to a system (...) rewarding students based on individual test scores. Our laboratory research design allows for the measurement of actual reporting. The high reporting rates in this study emphasize the importance of clearly stating what is considered to be unethical behavior and directly asking students about their ethical environment. Content Type Journal Article Pages 1-14 DOI 10.1007/s10805-012-9154-7 Authors Iris Jenkel, St. Norbert College, De Pere, WI, USA Jason J. Haen, St. Norbert College, De Pere, WI, USA Journal Journal of Academic Ethics Online ISSN 1572-8544 Print ISSN 1570-1727. (shrink)

Newton's bucket, Einstein's elevator, Schrödinger's cat – these are some of the best-known examples of thought experiments in the natural sciences. But what function do these experiments perform? Are they really experiments at all? Can they help us gain a greater understanding of the natural world? How is it possible that we can learn new things just by thinking? In this revised and updated new edition of his classic text _The Laboratory of the Mind_, James Robert Brown continues to (...) defend apriorism in the physical world. This edition features two new chapters, one on “counter thought experiments” and another on the development of inertial motion. With plenty of illustrations and updated coverage of the debate between Platonic rationalism and classic empiricism, this is a lively and engaging contribution to the field of philosophy of science. (shrink)

In this article we present and compare two early attempts to establish psychology as an independent scientific discipline that had considerable influence in central Europe: the theories of Johann Friedrich Herbart (1776—1841) and Franz Brentano (1838—1917). While both of them emphasize that psychology ought to be conceived as an empirical science, their conceptions show revealing differences. Herbart starts with metaphysical principles and aims at mathematizing psychology, whereas Brentano rejects all metaphysics and bases his method on a conception of inner perception (...) (as opposed to inner observation) as a secondary consciousness, by means of which one gets to be aware of all of one’s own conscious phenomena. Brentano’s focus on inner perception brings him to deny the claim that there could be unconscious mental phenomena — a view that stands in sharp contrast to Herbart’s emphasis on unconscious, ‘repressed’ presentations as a core element of his mechanics of mind. Herbart, on the other hand, denies any role for psychological experiments, while Brentano encouraged laboratory work, thus paving the road for the more experimental work of his students like Stumpf and Meinong. By briefly tracing the fate of the schools of Herbart and Brentano, respectively, we aim to illustrate their impact on the development of psychological research, mainly in central Europe. (shrink)

Thought experiments have played a prominent role in numerous cases of conceptual change in science. I propose that research in cognitive psychology into the role of mental modeling in narrative comprehension can illuminate how and why thought experiments work. In thought experimenting a scientist constructs and manipulates a mental simulation of the experimental situation. During this process, she makes use of inferencing mechanisms, existing representations, and general world knowledge to make realistic transformations from one possible physical state to the next. (...) The simulation reveals the impossibility of integrating multiple constraints drawn from existing representations and the world and pinpoints the locus of the required conceptual reform. (shrink)

La tensión entre fidelidad a la tradición e innovación presente en el pensamiento plotiniano se manifiesta de modo patente en su propuesta metafísica. La ontología expuesta en las Enéadas, en efecto, es un claro ejemplo de la labor exegética mediante la cual Plotino toma las concepciones metafísicas platónico-pitagóricas precedentes y las sintetiza infundiendo nueva vitalidad en ideas antiguas. Para llevar a cabo su exégesis utiliza, incluso, conceptos aristotélicos que integra de un modo peculiar a su pensamiento platonizante. En el presente (...) trabajo, pues, nos proponemos esclarecer el procedimiento interpretativo que Plotino lleva a cabo en la formulación de su doctrina de lo Uno y de la relación entre esta hipóstasis y la Inteligencia. En nuestro análisis examinamos las nociones metafísicas que nuestro filósofo toma como punto de partida y brindamos una interpretación de la transformación que opera sobre ellas para arribar al sistema que dio origen a una nueva corriente de pensamiento platónico. The tension between innovation and fidelity to tradition present in the thought of Plotinus manifests itself clearly in his metaphysical conception. The ontology put forward in the Enneads, in fact, is a fine example of the exegetical work by which our thinker takes the preceding platonic-pythagorean metaphysics and synthesizes it, bringing new vitality into ancient ideas. To accomplish his exegesis he even employs Aristotelian concepts incorporating them in a peculiar way to his Platonizing thought. In the present paper, hence, we intend to elucidate the interpretive procedure that Plotinus carries out to arrive at his conceptions of the One and of the relationship between this hypostasis and Intelligence. In our analysis, we examine the metaphysical notions that our philosopher takes as starting points and we offer an interpretation of the transformation he operates upon them to reach the system that gave birth to a new current of Platonic thought. (shrink)

Bruno Latour once argued that science laboratories actively modify the wider society by displacing crucial actors outside the laboratory into the “field.” This article turns this idea on its head by using the case of geothermal energy utilization to demonstrate that in many cases it is the experimental setup outside the laboratory that is there first, with the activities normally associated with a laboratory setting only being decided upon and implemented post hoc. As soon as the actors (...) involved perceive unknowns and uncertainties, these are relocated to various kinds of closed laboratories to be dealt with in a more controlled environment. This is done, for instance, by inviting stakeholders to laboratory-like settings or by analyzing the geochemical composition of fluids in laboratories. Thus, the risk-laden production of new knowledge by means of real-world experimentation amounts to a practice of relocating the context of discovery in society to laboratories of justification sometimes defined as such post hoc. Experimental processes in society can then be conceptualized as “real” experiments and laboratory activities as merely temporarily subordinated components of the larger experiment. (shrink)

This article elaborates a local history of zoo feeding practices in order to shed light on the construction of knowledge at the zoo, its intersection with laboratory developments in life sciences, and the nature of zoo sciences. It relies on the case studies of two of the oldest zoological gardens in the world-the Jardin des Plantes Ménagerie in Paris (1793) and the London Zoological Gardens (1828)-both of which formed parts of major scientific institutions, thereby facilitating research on the dialogue (...) between zoo knowledge and life sciences. The article argues that zoos developed around an experimental paradigm that consisted of testing on animals the (nutritional) variables of their survival within a highly constrained institutional framework. From the interwar period, the empirical nature of the zoo feeding economy was marked by slow and uneven changes, associated with the development of nutritional sciences as well as internal hygiene, pathology, and veterinary programmes. Despite transfers and networks of people, methods, experiments, concepts, and animals between zoos and life sciences laboratories, the former remained too impure as a research site to act as an extension of the latter. Zoos, however, needed external laboratories to support themselves with the scientific legitimacy that their “biopolitical modernisation” (Chrulew) required. In addressing programmatic changes as well as their impact upon the animals, this paper argues that trial-and-error experiments are constitutive of the zoo, contributing towards the definition of the nature of both zoo management and zoo sciences. (shrink)

There existed a tradition of mimetic experimentation in the late nineteenth century, whereby morphologists sought to scale down sublime natural phenomena to tabletop devices in the laboratory. Experimenters constructed analogs of the aurora, attempting to replicate the colors and forms of the phenomenon with discharge tube experiments and electrical displays, which became popular spectacles at London’s public galleries. This paper analyses a closely allied but different kind of imitation. Between 1872 and 1884, Professor Karl Selim Lemström (1838–1904) attempted to (...) reproduce the aurora borealis in all of its complexity atop four mountains in northern Finland. Crucially, his “artificial aurora” was to materialize at the same scale as the original phenomenon and in its natural habitat in the polar atmosphere. With his experiment Lemström hoped to uncover the workings of the aurora and the electrical currents that he believed were always present within the atmosphere; his epistemological framework was one of learning by making. This paper sheds light on the broader problem of what it meant to authentically replicate a phenomenon that remained largely enigmatic, and, most importantly, how this replication could be verified. This prompts a discussion as to whether model experiments needed only to appear visually similar to the objects they purported to imitate, were required to preserve their form, or needed to be materially identical in order to the original to be identified as legitimate “reproductions” in the late nineteenth century. (shrink)

For philosopher of science Paul Feyerabend, an outcome of the Plato-led victory of philosophers over poets is the ‘conquest of abundance’ where abstraction replaces the ‘richness of being’. This poignant motif is visible in the project of the social sciences, where theory describes classificatory schemas that can be imposed upon the social world to categorise and, subsequently, explain it. However, Homer’s writings provide a completely different frame of reference. By reimagining ourselves within this work we may be able to rethink (...) and reconfigure our understanding of science, and perhaps even the practice of science. This paper reports on a Feyerabendian ‘experiment’ in sociology of science which attempts to write contemporary scientific production from the frame of reference of Homer. This new methodology leads to fragments of epic poetry which act as a provocation to, and a disruption of, sociology of science and STS and their ways of making sense of science in society. (shrink)

This volume grew out of a conference held in 2016 at the Claremont School of Theology, while the conference itself grew out of "innovative conversations between philosophers, Erin Manning and Brian Massumi, and process philosophers, Roland Faber and Michael Halewood". Its title in effect conjoins a Whiteheadian conception of propositions and a Jamesian understanding of "things.". As such, a proposition is set forth on behalf of "a collectivity...

Features of experimental design impose auxiliary hypotheses on experimenters. Hertwig & Ortmann rightly argue that the ways some variables are implemented in psychology cloud results, whereas the different implementations in economics provide for more robust results. However, not all design variables support this general conclusion. The repetition of trials may confuse results depending on what theory is being tested. We explore this in the case of simple bargaining games.

Rather than a “logical assertion,” Whitehead described a proposition as a “lure for feeling” for a collectivity to come. The unique contributions in Propositions in the Making articulate the newest reaches of Whiteheadian propositions for a postmodern world.

We develop an account of laboratory models, which have been central to the group selection controversy. We compare arguments for group selection in nature with Darwin's arguments for natural selection to argue that laboratory models provide important grounds for causal claims about selection. Biologists get information about causes and cause-effect relationships in the laboratory because of the special role their own causal agency plays there. They can also get information about patterns of effects and antecedent conditions in (...) nature. But to argue that some cause is actually responsible in nature, they require an inference from knowledge of causes in the laboratory context and of effects in the natural context. This process, cause detection, forms the core of an analogical argument for group selection. We discuss the differing roles of mathematical and laboratory models in constructing selective explanations at the group level and apply our discussion to the units of selection controversy to distinguish between the related problems of cause determination and evaluation of evidence. Because laboratory models are at the intersection of the two problems, their study is crucial for framing a coherent theory of explanation for evolutionary biology. (shrink)

Fourteen subjects were tape‐recorded while they undertook to find a law to summarize numerical data they were given. The source of the data was not identified, nor were the variables labeled semantically. Unknown to the subjects, the data were measurements of the distances of the planets from the sun and the periods of their revolutions about it—equivalent to the data used by Johannes Kepler to discover his third law of planetary motion.Four of the 14 subjects discovered the same law as (...) Kepler did (the period varies as the 3/2 power of the distance), and a fifth came very close to the answer. The subiects' protocols provide a detailed picture of the problem‐solving searches they engaged in, which were mainly, but not exclusively, in the space of possible functions for fitting the data, and provide explanations as to why some succeeded and the others failed.The search heuristics used by the subjects are similar to those embodied in the BACON program, computer simulation of certain scientific discovery processes. The experiment demonstrates the feasibility of examining some of the processes of scientific discovery by recreating, in the laboratory, discovery situations of substantial historical relevance. It demonstrates also, that under conditions rather similar to those of the original discoverer, a law can be rediscovered by persons of ordinary intelligence (i.e., the intelligence needed for academic success in a good university). The data for the successful subjects reveal no “creative” processes in this kind of a discovery situation different from those that are regularly observed in all kinds of problem‐solving settings. (shrink)

Building on a previously published contextualization of Marco Buzzoni’s Neo- Kantian account of scientific thought-experiments, this paper examines the explanatory power of this account. It is argued that Buzzoni’s account suffers from a number of shortcomings. Einstein’s clock-in-the-box thought experiment facilitates the demonstration of these deficits. In the light of both the identified inadequacies of Buzzoni’s account and the long-standing history of Kantian approaches to thought experiments, this paper finally sketches an alternative Neo-Kantian account. This alternative utilizes Michael Friedman’s (...) reading of Kant’s a priori within a Kuhnian account of thought experiments along the lines of conceptual constructivism as anticipated by Georg Lichtenberg and further developed recently by Tamar Gendler. (shrink)

In this essay, I will expand the philosophical discussion about the representational practice in science to examine its role in science education through four case studies. The cases are of what I call ‘educational laboratory experiments’, performative models used representationally by students to come to a better understanding of theoretical knowledge of a scientific discipline. The studies help to demonstrate some idiosyncratic features of representational practices in science education, most importantly a lack of novelty and discovery built into the (...) ELEs as their methodology is solidified when it becomes a widely spread educational tool within a discipline. There is thus an irreducible role for the historical development of ELEs in understanding their representational nature and use. The important role of the historical development of ELEs leads to an interesting way that educators can use ELEs as a means of connecting students to important historical developments within their disciplines. (shrink)

Testing economic propositions in laboratory experiments has proven a very fruitful research endeavor in recent years. This volume brings together the major contributors to experimental economics. The papers present their views on the way experiments should be done, on the power and limitations of the techniques, and on the areas in which experimentation could contribute substantially to our understanding of economic behavior. This book distills the main lessons from great experience in experimental work. It will be essential reading for (...) all who wish to follow experimental work or who wish to do such work themselves. (shrink)

For centuries the question of the origin of life had focused on the question of the spontaneous generation of life, at least primitive forms of life, from inanimate matter, an idea that had been promoted most prominently by Aristotle. The widespread belief in spontaneous generation, which had been adopted by the Church, too, was finally abandoned at the beginning of the twentieth century, when the question of the origin of life became related to that of the artificial generation of life (...) in the laboratory. This paper examines the role of social authorities, researchers’ basic beliefs, crucial experiments, and scientific advance in the controversies about spontaneous generation from the seventeenth to the nineteenth centuries and analyzes the subsequent debates about the synthesis of artificial life in the changing scientific contexts of the nineteenth and early-twentieth centuries. It shows that despite the importance of social authorities, basic beliefs, and crucial experiments scientific advances, especially those in microbiology, were the single most important factor in the stepwise abandoning of the doctrine of spontaneous generation. Research on the origin of life and the artificial synthesis of life became scientifically addressed only when it got rid of the idea of constant smooth transitions between inanimate matter and life and explored possible chemical and physical mechanisms of the specificity of basic molecules and processes of life. (shrink)

The article addresses the production of reproducibility as a topic that has become acutely relevant in the recent discussions on the replication crisis in science. It brings the ethnomethodological stance on reproducibility into the discussions, claiming that reproducibility is necessarily produced locally, on the shop floor, with methodological guidelines serving as references to already established practices rather than their origins. The article refers to this argument empirically, analyzing how a group of novice neuroscientists performs a series of measurements in a (...) transcranial magnetic stimulation experiment. Based on ethnography and video analysis, the article traces a history of the local measurement procedure invented by the researchers in order to overcome the experimental uncertainty. The article aims to demonstrate how reproducibility of the local procedure is achieved in the shop floor work of the practitioners and how the procedure becomes normalized and questioned as incorrect in the course of experimental practice. It concludes that the difference between guidelines and practical actions is not problematic per se; what may be problematic is that researchers can be engaged in different working projects described by the same instruction. (shrink)