A pure significance test would check the agreement of a statistical model with the observed data even when no alternative model was available. The paper proposes the use of a modified p -value to make such a test. The model will be rejected if something surprising is observed. It is shown that the relation between this measure of surprise and the surprise indices of Weaver and Good is similar to the relationship between a p -value, a corresponding odds-ratio, and (...) a logit or log-odds statistic. The s -value is always larger than the corresponding p -value, and is not uniformly distributed. Difficulties with the whole approach are discussed. (shrink)

Mealey argued that sociopathy is an evolutionary stable strategy subject to frequency-dependent selection – high levels of sociopathy being advantageous to the individual if population-wide frequencies of it are low, and vice versa. I argue that at least one alternative hypothesis exists that explains her data equally well. Alternative hypotheses must be formulated and tested before any theory can be validated.

Previous research has found no consistent relationship between measures of disconfirmatory evidence, alternative hypotheses, and people's success in rule-discovery tasks. The present paper explores falsification's inductive benefit under the ?context of discovery? in Wason's 2?4?6 task by developing a new type of alternative hypothesis, which we label the ?new-perspective hypothesis?. Experiment 1 found that falsification is effective only when a new-perspective hypothesis is generated, rather than a same-perspective hypothesis. The total number of alternative (...) hypotheses was also unrelated to rule-discovery success. Experiment 2 replicated Experiment 1 but included the addition of a different name-content task as well as two levels of task difficulty. The main findings were similar to those for Experiment 1, and the new-perspective hypothesis was observed to be most important for the difficult rule-discovery task. These results help to clarify the important ways new-perspective hypotheses and disconfirmatory evidence contribute to successful rule-discovery performance. (shrink)

We conducted a meta-analysis of 17 studies that tested for an association between grandparental survival and grandchild survival in patrilineal populations. Using two different methodologies, we found that the survival of the maternal grandmother and grandfather, but not the paternal grandmother and grandfather, was associated with decreased grandoffspring mortality. These results are consistent with the findings of psychological studies in developed countries (Coall and Hertwig Behavioral and Brain Sciences 33:1-59, 2010). When tested against the predictions of five hypotheses (confidence of (...) paternity; grandmothering, kin proximity, grandparental senescence, and local resource competition), our meta-analysis results are most in line with the local resource competition hypothesis. In patrilineal and predominantly patrilocal societies, the grandparents who are most likely to live with the grandchildren have a less beneficial association than those who do not. We consider the extent to which these results may be influenced by the methodological limitations of the source studies, including the use of retrospective designs and inadequate controls for confounding variables such as wealth. (shrink)

Westermarck’s Hypothesis is widely accepted by evolutionary scientists as the best explanation for human incest avoidance. However, its explanatory shortcomings have been largely ignored and it has never been pitted against alternative biological hypotheses. Although WH may account for incest avoidance between co-reared kin, it cannot explain other forms of incest avoidance, and cannot account for the differential incidence of sibling-sibling, mother-son, father-daughter and other forms of incest. WH also faces problems adequately addressing phenomena within its explanatory domain. (...) Neither of the studies generally considered to corroborate WH provides a genuine test of it, and the results of experiments thought to confirm WH are vitiated by methodological problems. The present article considers two alternatives to WH: the shared mother hypothesis and the maternal phenotype-matching hypothesis . SMH states that human infants imprint on their mother, and then treat as kin those individuals toward whom their mother behaves in akin-like or mate-like manner. MPMH states that humans unconsciously use the maternal phenotype as a visual template for estimating coefficients of relatedness, and that these estimates regulate altruistic and mating behavior. Both SMH and MPMH are able to account for the kibbutz and simpua marriage data, and entail additional epidemiological and experimental predictions. SMH and MPMH have greater explanatory power than WH. (shrink)

Mental disorders as defined by current classifications are not fully supported by scientific evidence. It is unclear whether main disorders should be broken down into separate categories or disposed along a continuous spectrum. In the near future, new classes of mental disorders could be defined through associations of so-called abnormalities observed at the genetic, molecular and neuronal circuitry levels.

This commentary advocates an alternative to null-hypothesis testing that was originally represented by Rozeboom over three decades ago yet is not considered by Chow (1996). The central distinguishing feature of this approach is that it allows the scientist to conclude that the data are much better fit by those hypotheses whose values fall inside the interval than by those outside.

P3 is the most prominent of the electrical potentials of the human electroencephalogram that are sensitive to psychological variables. According to the most influential current hypothesis about its psychological significance [E. Donchin's], the “context updating” hypothesis, P3 reflects the updating of working memory. This hypothesis cannot account for relevant portions of the available evidence and it entails some basic contradictions. A more general formulation of this hypothesis is that P3 reflects the updating of expectancies. This version (...) implies that P3-evoking stimuli are initially unexpected but later become expected. This contradiction cannot be resolved within this formulation. The alternative “context closure” hypothesis retains the concept of “strategic information processing” emphasized by the context updating hypothesis. P3s are evoked by events that are awaited when subjects deal with repetitive, highly structured tasks; P3s arise from subjects' combining successive stimuli into larger units. The tasks in which P3s are elicited can accordingly be classified in terms of their respective formal sequences of stimuli. P3 may be a physiological indicator of excess activation being released from perceptual control areas. (shrink)

I consider the error-statistical account as both a theory of evidence and as a theory of inference. I seek to show how inferences regarding the truth of hypotheses can be upheld by avoiding a certain kind of alternative hypothesis problem. In addition to the testing of assumptions behind the experimental model, I discuss the role of judgments of implausibility. A benefit of my analysis is that it reveals a continuity in the application of error-statistical assessment to low-level empirical (...) hypotheses and highly general theoretical principles. This last point is illustrated with a brief sketch of the issues involved in the parametric framework analysis of tests of physical theories such as General Relativity and of fundamental physical principles such as the Einstein Equivalence Principle. (shrink)

Sherri Roush ([2005]) and I ([2001], [2006]) have each argued independently that the most significant challenge to scientific realism arises from our inability to consider the full range of serious alternatives to a given hypothesis we seek to test, but we diverge significantly concerning the range of cases in which this problem becomes acute. Here I argue against Roush's further suggestion that the atomic hypothesis represents a case in which scientific ingenuity has enabled us to overcome the problem, (...) showing how her general strategy is undermined by evidence I have already offered in support of what I have called the 'problem of unconceived alternatives'. I then go on to show why her strategy will not generally (if ever) allow us to formulate and test exhaustive spaces of hypotheses in cases of fundamental scientific theorizing. (shrink)

This chapter contains section titled: The Theory Theory The Theory Theory vs. Other Empiricist Alternatives Innate Theories and Starting‐state Nativism Phenomenological and Social Objections Universality, Uniformity, and Learning Theory Formation and Language.

Hierarchical expansions of the theory of natural selection exist in two distinct bodies of thought in evolutionary biology, the group selection and the species selection traditions. Both traditions share the point of view that the principles of natural selection apply at levels of biological organization above the level of the individual organism. This leads them both to considermultilevel selection situations, where selection is occurring simultaneously at more than one level. Impeding unification of the theoretical approaches of the multilevel selection traditions (...) are the different goals of investigators in the different subdisciplines and the different types of data potentially available for analysis. We identify two alternative approaches to multilevel situations, which we termmultilevel selection [1] andmultilevel selection [2]. Of interest in the former case are the effects of group membership onindividual fitnesses, and in the latter the tendencies for the groups themselves to go extinct or to found new groups (i.e., group fitnesses). We argue that: neither represents the entire multilevel selection process; both are aspects of any multilevel selection situation; and both are legitimate approaches, suitable for answering different questions. Using this formalism, we show that: multilevel selection [2] does not require emergent group properties in order to provide an explanatory mechanism of evolutionary change; multilevel selection [1] is usually more appropriate for neontological group selection studies; and species selection is most fruitfully considered from the point of view of multilevel selection [2]. Finally we argue that the effect hypothesis of macroevolution, requiring, in selection among species, both the absence of group effects on organismic fitness (multilevel selection [1]), and the direct determination of species fitnesses by those of organisms, is untestable with paleontological data. Furthermore, the conditions for the effect hypothesis to hold are extremely restrictive and unlikely to apply to the vast majority of situations encountered in nature. (shrink)

It is a truth universally known but not oft discussed that a journal article is often a fragment of a larger series of thoughts, or a longer piece of work. In entering into dialogue with Gaab and Bamboulis and Bortolotti, I will briefly describe the context of this paper, in the hopes that it will clarify my commitments and wider thinking on this area.This paper isolates one thread of my doctoral dissertation evaluating what I take to be two central theoretical (...) claims of CBT: first, that mental illness is related to patterns of thought with epistemic issues and secondly, that CBT works through rectifying these epistemic issues. In the broader work I argue that over time, because psychotherapy has... (shrink)

I consider a number of questions for foundational epistemology that arise from further reflection on salience of alternatives and epistemic position. On this basis, I turn to more applied issues. First, I will consider work in social psychology to motivate the working-hypothesis that social stereotypes will make some alternatives more, and some less, salient. A related working-hypothesis is that social stereotypes may lead to both overestimation and underestimation of a subject’s epistemic position. If these working-hypotheses are true, the (...) outcome may be a distinctive route to epistemic injustice. (shrink)

We are grateful for these two insightful commentaries, which both see novelty and value in the manner in which we invoke the hypothesis that anorexia nervosa is a passion, to help explain data from the Anorexia Experiences Study, which provides the basis of our inquiry. In this response, we wish to clarify and elaborate on our hypothesis; in particular, the difference between passions and moods, the manner in which our hypothesis touches on issues of authenticity and identity, (...) and the compelling parallel with addiction. We also wish to emphasize that, in proposing the hypothesis that anorexia nervosa is a passion, our primary aim is not so much to exclude or replace alternative theoretical approaches. Our focus, really, is to argue that the hypothesis that anorexia nervosa is a passion adds something rich and unique to our current understanding of that condition, which is not fully or adequately captured by alternative accounts... (shrink)

According to the dominant computational approach in cognitive science, cognitive agents are digital computers; according to the alternative approach, they are dynamical systems. This target article attempts to articulate and support the dynamical hypothesis. The dynamical hypothesis has two major components: the nature hypothesis (cognitive agents are dynamical systems) and the knowledge hypothesis (cognitive agents can be understood dynamically). A wide range of objections to this hypothesis can be rebutted. The conclusion is that cognitive (...) systems may well be dynamical systems, and only sustained empirical research in cognitive science will determine the extent to which that is true. (shrink)

In his [1937, 1938], Paul Dirac proposed his “Large Number Hypothesis” (LNH), as a speculative law, based upon what we will call the “Large Number Coincidences” (LNC’s), which are essentially “coincidences” in the ratios of about six large dimensionless numbers in physics. Dirac’s LNH postulates that these numerical coincidences reflect a deeper set of law-like relations, pointing to a revolutionary theory of cosmology. This led to substantial work, including the development of Dirac’s later [1969/74] cosmology, and other alternative (...) cosmologies, such as the Brans-Dicke modification of GTR, and to extensive empirical tests. We may refer to the generic hypothesis of “Large Number Relations” (LNR’s), as the proposal that there are lawlike relations of some kind between the dimensionless numbers, not necessarily those proposed in Dirac’s early LNH. Such relations would have a profound effect on our concepts of physics, but they remain shrouded in mystery. Although Dirac’s specific proposals for LNR theories have been largely rejected, the subject retains interest, especially among cosmologists seeking to test possible variations in fundamental constants, and to explain dark energy or the cosmological constant. In the first two sections here we briefly summarize the basic concepts of LNR’s. We then introduce an alternative LNR theory, using a systematic formalism to express variable transformations between conventional measurement variables and the true variables of the theory. We demonstrate some consistency results and review the evidence for changes in the gravitational constant G. The theory adopted in the strongest tests of Ġ/G, by the Lunar Laser Ranging (LLR) experiments, assumes: Ġ/G = 3(dr/dt)/r – 2(dP/dt)/P – (dm/dt)/m, as a fundamental relationship. Experimental measurements show the RHS to be close to zero, so it is inferred that significant changes in G are ruled out. However when the relation is derived in our alternative theory it gives: Ġ/G = 3(dr/dt)/r – 2(dP/dt)/P – (dm/dt)/m – (dR/dt)/R. The extra final term (which is the Hubble constant) is not taken into account in conventional derivations. This means the LLR experiments are consistent with our LNR theory (and others), and they do not really test for a changing value of G at all. This failure to transform predictions of LNR theories correctly is a serious conceptual flaw in current experiment and theory. (shrink)

Many philosophers and psychologists now argue that emotions play a vital role in reasoning. This paper explores one particular way of elucidating how emotions help reason which may be dubbed ?the search hypothesis of emotion?. After outlining the search hypothesis of emotion and dispensing with a red herring that has marred previous statements of the hypothesis, I discuss two alternative readings of the search hypothesis. It is argued that the search hypothesis must be construed (...) as an account of what emotions typically do, rather than as a definition of emotion. Even as an account of what emotions typically do, the search hypothesis can only be evaluated in the context of a specific theory of what emotions are. 1 Introduction 2 The search hypothesis of emotion 3 A red herring: the frame problem 4 The search problem 5 Two readings of the search hypothesis 6 Two final remarks 7 Conclusion. (shrink)

The various academic works about the analysis of the actual functionning of alternation in professionnal training reveal a great descrepancy with the prescriptive model, qualified institutionnal or organisationnal model. In order to take some distance from this technical coordinative model of alternation in training, the hypothesis is made that the alternant is the one creating bonds.The results of an active resarch, based on the experimentation of a pro-training arrangement made to support this bonding work, are presented and put in (...) perspective with the initial hypothesis. This bonding work is considered a reliance activity of the alternants. Also, the pro-training arrangement built from the richness of the class-group, born from the commitment of the alternants, creates a typical dynamic which we chose to call actor-network. (shrink)

The hygiene hypothesis offers an explanation for the correlation, well-established in the industrialized nations of North and West, between increased hygiene and sanitation, and increased rates of asthma and allergies. Recent studies have added to the scope of the hypothesis, showing a link between decreased exposure to certain bacteria and parasitic worms, and increased rates of depression and intestinal auto- immune disorders, respectively. What remains less often discussed in the research on these links is that women have higher (...) rates than men of asthma and allergies, as well as many auto-immune disorders, and also depression. The current paper introduces a feminist understanding of gender socialization to the epidemiological and immunological picture. That standards of cleanliness are generally higher for girls than boys, especially under the age of five when children are more likely to be under close adult supervision, is a robust phenomenon in industrialized nations, and some research points to a cross- cultural pattern. I conclude that, insofar as the hygiene hypothesis successfully identifies standards of hygiene and sanitation as mediators of immune health, then attention to the relevant patterns of gender socialization is important. The review also makes clear that adding a feminist analysis of gender socialization to the hygiene hypothesis helps explain variation in morbidity rates not addressed by other sources and responds to a number of outstanding puzzles in current research. Alternative explanations for the sex differences in the relevant morbidity rates are also discussed (e.g., the effects of estrogens). Finally, new sources of evidence for the hygiene hypothesis are suggested in the form of cross-cultural and other natural experiments. (shrink)

This paper is dedicated to a critical discussion of the logical-philosophical conceptions of language that are presented in Rolandas Pavilionis’ book Language. Logic. Philosophy, its primary focus being an analysis of Pavilionis’ hypothesis of meaning as nonverbal continuous system. The paper consists of two parts. Two types of theories of meaning are distinguished and an analysis of the discussed conceptions of natural languages is proposed in the first, analytic, part of the paper: assumptions that are relevant for the philosophical (...) semantics are identified and used for clarification of the presuppositions of the alternative semantic programme advanced by Pavilionis. Two shortcomings of Pavilionis’ semantic theory are presented in the second, critical, part of the paper. First, it is maintained that Pavilionis’ theory of understanding, which suggests taking the notion of interpretation as fundamental, is unacceptable: interpretation is an enabling, not a constitutive condition of understanding. Second, due to the lack of discussion of the epistemic aspects of meaning and the relation between concepts and conceptual capacities, it remains unclear what theoretical value can be carried by the idea of innate concepts and how can it be made compatible with externalistic aspects of this semantic theory. (shrink)

Complex constraints like conditionals ('If A, then B') and probabilistic constraints ('The probability that A is p') pose problems for Bayesian theories of learning. Since these propositions do not express constraints on outcomes, agents cannot simply conditionalize on the new information. Furthermore, a natural extension of conditionalization, relative information minimization, leads to many counterintuitive predictions, evidenced by the sundowners problem and the Judy Benjamin problem. Building on the notion of a `paradigm shift' and empirical research in psychology and economics, I (...) argue that the model of hypothesis testing can explain how people learn complex, theory-laden propositions like conditionals and probability constraints. Theories are formalized as probability distributions over a set of possible outcomes and theory change is triggered by a constraint which is incompatible with the initial theory. This leads agents to consult a higher order probability function, or a 'prior over priors,' to choose the most likely alternative theory which satisfies the constraint. The hypothesis testing model is applied to three examples: learning a simple probabilistic constraint involving coin bias, the sundowners problem for conditional learning, and the Judy Benjamin problem for learning conditional probability constraints. (shrink)

In this paper, I propose that, in addition to the multiverse hypothesis, which is commonly taken to be an alternative explanation for fine-tuning, other than the design hypothesis, the simulation hypothesis is another explanation for fine-tuning. I then argue that the simulation hypothesis undercuts the alleged evidential connection between ‘designer’ and ‘supernatural designer of immense power and knowledge’ in much the same way that the multiverse hypothesis undercuts the alleged evidential connection between ‘fine-tuning’ and (...) ‘fine-tuner’ (or ‘designer’). If this is correct, then the fine-tuning argument is a weak argument for the existence of God. (shrink)

Existing economic models of prosociality have been rather silent in terms of proximate psychological mechanisms. We nevertheless identify the psychologically most informed accounts and offer a critical discussion of their hypotheses for the proximate psychological explanations. Based on convergent evidence from several fields of research, we argue that there nevertheless is a more plausible alternative proximate account available: the social motivation hypothesis. The hypothesis represents a more basic explanation of the appeal of prosocial behavior, which is in (...) terms of anticipated social rewards. We also argue in favor of our own social motivation hypothesis over Robert Sugden’s fellow-feeling account (due originally to Adam Smith). We suggest that social motivation not only stands as a proximate account in its own right but also provides a plausible scaffold for other more sophisticated motivations (e.g., fellow-feelings). We conclude by discussing some possible implications of the social motivation hypothesis on existing modeling practice. (shrink)

The method of cases (MOC), as standardly construed, involves an evidential appeal to intuitions. Philosophers, however, often argue for their case verdicts, they offer reasons for accepting their truth. According to Max Deutsch and Herman Cappelen – whose ground-breaking case studies first drew attention to this underappreciated phenomenon – their reason-giving would constitute compelling evidence that, contrary to the received view, philosophers relying on MOC regard arguments, not intuitions, as their main justificatory source. This explanatory hypothesis has met with (...) substantial resistance among metaphilosophers. The main goal of this paper is to broaden the theoretical playing field by considering a yet unexplored alternative hypothesis. I argue that said phenomenon in fact admits of an alternative, intuition-friendly explanation in light of a fundamental distinction in justification theory which has been entirely overlooked by the current debate – i.e. the one between justifying a belief and being justified in holding it. This distinction, I suggest, allows one to naturally construe philosophers’ justifying activity as a dialectically motivated kind of proactive reasoning geared toward the goal of maximizing consensus over their verdicts. Once thus construed, it remains compatible with philosophers thinking of intuitions as the main source of their justification. (shrink)

Most theories and models of memory are based on two assumptions that contain theoretical problems. These problems are reflected in the memory-trace paradox, which consists in believing that the past is contained in the memory trace, and in the fallacy of the homunculus, which consists in assuming the existence of an unconscious intentional subject. We will discuss these and present an alternative hypothesis concerning the relationship between memory, consciousness and temporality. This holds that consciousness is not a unitary (...) dimension, but is the set of distinct and original modes to address the object. Among the modes of consciousness, a distinction is made between Knowing Consciousness (KC) and Temporal Consciousness (TC). KC describes the mode of addressing the object in order to know it. TC describes the mode of consciousness that temporalizes its object according the subordinate structures of temporality, the past, the present and the future. Finally it is shown how the hypothesis accounts for a variety of memory disorders and phenomena while avoiding the memory- trace paradox and the fallacy of the homunculus. (shrink)

The interpretation of tests of a point null hypothesis against an unspecified alternative is a classical and yet unresolved issue in statistical methodology. This paper approaches the problem from the perspective of Lindley's Paradox: the divergence of Bayesian and frequentist inference in hypothesis tests with large sample size. I contend that the standard approaches in both frameworks fail to resolve the paradox. As an alternative, I suggest the Bayesian Reference Criterion: it targets the predictive performance of (...) the null hypothesis in future experiments; it provides a proper decision-theoretic model for testing a point null hypothesis and it convincingly accounts for Lindley's Paradox. (shrink)

I’m going to argue for a set of restricted skeptical results: roughly put, we don’t know that fire engines are red, we don’t know that we sometimes have pains in our lower backs, we don’t know that John Rawls was kind, and we don’t even know that we believe any of those truths. However, people unfamiliar with philosophy and cognitive science do know all those things. The skeptical argument is traditional in form: here’s a skeptical hypothesis; you can’t epistemically (...) neutralize it, you have to be able to neutralize it to know P; so you don’t know P. But the skeptical hypotheses I plug into it are “real, live” scientific-philosophical hypotheses often thought to be actually true, unlike any of the outrageous traditional skeptical hypotheses (e.g., ‘You’re a brain in a vat’). So I call the resulting skepticism Live Skepticism. Notably, the Live Skeptic’s argument goes through even if we adopt the clever anti-skeptical fixes thought up in recent years such as reliabilism, relevant alternatives theory, contextualism, and the rejection of epistemic closure. Furthermore, the scope of Live Skepticism is bizarre: although we don’t know the simple facts noted above, many of us do know that there are black holes and other amazing facts. (shrink)

I aim to develop an alternative theoretical model for the direct cognition of the elementary states of others called the theory of interaction (henceforth TI), also known as the “second person” approach. The model I propose emerges from a critical reformulation of the displaced perception model proposed by FRED DRETSKE (1995) for the introspective knowledge of our own mental states. Moreover, against Dretske, I argue that no meta-representation (second-order representation of a first-order representation as a representation) is involved in (...) the process, but only concepts, rudimentary enough, of others’ emotions: contentment and discontentment. Strictly speaking, all the empirical data and findings in developmental psychology only support the hypothesis that children in the pre-linguistic phase understand perceptual facial expressions of contentment and discontentment. My proposal consists of the following thesis: The direct perception of others' elementary mental states is not a perception in the usual sense of the word according to which we just perceive things, but rather a “perception of facts.” But how to understand that? It is nothing more than an epistemological process that is automatic and reliable at the same time. It is reliable in the epistemological-externalist sense of not involving any inference, reflection, theorizing or epistemic justification: a baby’s perception of her mom’s facial expression of discontentment (in the usual sense of “per- ception”) does not constitute a reason supporting the belief that mommy is discontent. The very word “belief” should not be understood in the usual sense but rather in the sense of a natural inclination for truth. But at the same time, it is automatic because the belief is a result or output of a process entirely subliminal and computational in nature. Thus, for instance, a child perceives that her mom is discontent (fact-awareness) by perceiving consciously (“perception” in the usual sense) a facial expression of discontentment (sensorial input) but recognizes that her mother is discontent as a result (output) of an entirely subliminal process. (shrink)

The intertheoretic competition hypothesis (the rejection of a theory not only requires the comparison of the theory with nature but also the acceptance of an alternative theory) is a dogma of contemporary philosophy of science. I first attempt to reconstruct Thomas Kuhn's argument for the view. A central exegetical claim is that his argument rests on the Duhemian Thesis. I then show that the argument is inconclusive and suggest that there are vivid historical counterexamples to the competition (...) class='Hi'>hypothesis. (shrink)

Serial homology is widespread in organismal design, but the origin and individuation of these repeated structures appears to differ with the different types of serial homologues, and remains an intriguing and exciting topic of research. Here I focus on the evolution of the serially repeated eyespots that decorate the margin of the wings of nymphalid butterflies. In this system, unresolved questions relate to the evolutionary steps that lead to the appearance of these serial homologues and how their separate identities evolved. (...) I present and discuss two alternative hypotheses. The first proposes that eyespots first appeared as a row of undifferentiated repeated modules, one per wing compartment, that later become individuated. This individuation allowed eyespots to appear and disappear from specific wing compartments and also allowed eyespots to acquire different morphologies. The second hypothesis proposes that eyespots first appeared as individuated single units, or groups of units, that over evolutionary time were co‐opted into new compartments on the wing. I discuss the merits of each of these alternate hypotheses by finding analogies to other systems and propose research avenues for addressing these issues in the future. BioEssays 30:358–366, 2008. © 2008 Wiley Periodicals, Inc. (shrink)

Mangan’s hypothesis, that consciousness is an information-bearing medium, presents an alternative to Dennett’s brand of functionalism, and Dennett’s counterattacks have yet to address Mangan’s main assertion. The medium hypothesis does not entail Cartesian theater assumptions concerning the localization, causal status, and “filling in” of consciousness in the brain. In principle, it is compatible with distributed information transfer between different media, epiphenomenalism, and gaps in visual experience. However, Mangan’s strongest empirical argument, based on consciousness’ limited “bandwidth,” does not (...) necessarily show that transduction between media of different information-bearing capacities occurs between the brain and consciousness. The features of consciousness that he attributes to a lower bandwidth medium can be explained in terms of functional constraints on a single medium. Furthermore, empirical results showing gaps and anomalies in visual experience speak against consciousness being a medium. (shrink)

To avoid endless and futile debate, critics of an alternative paradigmatic hypothesis cannot simply state their own paradigmatic assumptions as if they were plain fact while dismissing those of the opposition as self-evidently absurd, because it is exactly those initial assumptions that are brought into question by the paradigmatic proposal. Perceived incredibility is no valid ground for rejection of a paradigm whose alternatives are at least equally incredible, and arguably more so.

A growing number of studies have found that large brains may help animals survive by avoiding predation. These studies provide an alternative explanation for existing correlative evidence for one of the dominant hypotheses regarding the evolution of brain size in animals, the social brain hypothesis (SBH). The SBH proposes that social complexity is a major evolutionary driver of large brains. However, if predation both directly selects for large brains and higher levels of sociality, correlations between sociality and brain (...) size may be spurious. We argue that tests of the SBH should take direct effects of predation into account, either by explicitly including them in comparative analyses or by pin‐pointing the brain‐behavior‐fitness pathway through which the SBH operates. Existing data and theory on social behavior can then be used to identify precise candidate mechanisms and formulate new testable predictions. (shrink)

Entertaining diverse assumptions about empirical research, commentators give a wide range of verdicts on the NHSTP defence in Statistical significance. The null-hypothesis significance- test procedure is defended in a framework in which deductive and inductive rules are deployed in theory corroboration in the spirit of Popper's Conjectures and refutations. The defensible hypothetico-deductive structure of the framework is used to make explicit the distinctions between substantive and statistical hypotheses, statistical alternative and conceptual alternative hypotheses, and making statistical decisions (...) and drawing theoretical conclusions. These distinctions make it easier to show that H0 can be true, the effect size is irrelevant to theory corroboration, and “strong” hypotheses make no difference to NHSTP. Reservations about statistical power, meta-analysis, and the Bayesian approach are still warranted. (shrink)

At first sight, homosexuality has little to do with reproduction. Nevertheless, many neo-Darwinian theoreticians think that human homosexuality may have had a procreative value, since it enabled the close kin of homosexuals to have more viable offspring than individuals lacking the support of homosexual siblings. In this article, however, we will defend an alternative hypothesis - originally put forward by Freud in "A phylogenetic phantasy" - namely that homosexuality evolved as a means to strengthen social bonds. Consequently, from (...) an evolutionary point of view, homosexuality and heterosexuality have entirely distinct origins: there is no continuum from heterosexuality to homosexuality. Indeed, the natural history we propose shows that the intensity of the homosexual inclination has little or no predictive value with regard to the intensity of heterosexual tendencies. In fact, this may be a sound Darwinian way to understand sexual ambivalence. But if sexual ambivalence is a biological datum, one has to conclude that psychodynamic mechanisms are often needed in order to explain exclusive heterosexuality or exclusive homosexuality. (shrink)

In the context of two recent yet distinct philosophical debates—over choice under conditions of moral uncertainty and over transformative choices—several philosophers have implicitly adopted a thesis about how to evaluate alternatives of uncertain value. The thesis says that the value a rational agent ought to attach to an alternative under the hypothesis that the value of this alternative is x, ought to be x. I argue that while in some contexts this thesis trivially holds, in the context (...) of the two debates in which the thesis has been adopted, it does not. I also discuss several implications of this failure. (shrink)

Loss of the Y‐chromosome is a common feature of species with chromosomal sex determination. However, our understanding of why some lineages frequently lose Y‐chromosomes while others do not is limited. The fragile Y hypothesis proposes that in species with chiasmatic meiosis the rate of Y‐chromosome aneuploidy and the size of the recombining region have a negative correlation. The fragile Y hypothesis provides a number of novel insights not possible under traditional models. Specifically, increased rates of Y aneuploidy may (...) impose positive selection for (i) gene movement off the Y; (ii) translocations and fusions which expand the recombining region; and (iii) alternative meiotic segregation mechanisms (achiasmatic or asynaptic). These insights as well as existing evidence for the frequency of Y‐chromosome aneuploidy raise doubt about the prospects for long‐term retention of the human Y‐chromosome despite recent evidence for stable gene content in older non‐recombining regions. (shrink)

The last decade or so has witnessed a wave of empirical studies purporting to show that men’s sexual focus on the female body leads to increased hostility and aggression against women. According to what I call “The Objectification Hypothesis”, the explanation for this phenomenon has to do with the fact that, in such circumstances, men “objectify” women, that is, regard them as mere objects or as means only. The paper rejects this hypothesis and offers an alternative explanation (...) for the connection between men’s sexual gaze and their aggression against women. This explanation makes no reference to the notions of seeing-other-as-object or of treating-as-means-only. Instead, it locates the dynamic at hand within the theoretical framework of misogyny along the lines developed by Kate Manne. (shrink)

The fundamental mechanisms of protein and lipid organization at the plasma membrane have continued to engage researchers for decades. Among proposed models, one idea has been particularly successful which assumes that sterol‐dependent nanoscopic phases of different lipid chain order compartmentalize proteins, thereby modulating protein functionality. This model of membrane rafts has sustainably sparked the fields of membrane biophysics and biology, and shifted membrane lipids into the spotlight of research; by now, rafts have become an integral part of our terminology to (...) describe a variety of cell biological processes. But is the evidence clear enough to continue supporting a theoretical concept which has resisted direct proof by observation for nearly twenty years? In this essay, we revisit findings that gave rise to and substantiated the raft hypothesis, discuss its impact on recent studies, and present alternative mechanisms to account for plasma membrane heterogeneity. (shrink)

One hypothesis of isocortical evolution requires tangential migration of glutaminergic neurons. A second requires invasion of collothalamic afferents into the dorsal pallium, a territory that in sauropsids is solely lemnopallial. A third alternative is noted here – duplication of the original collopallial territory. The duplicated region would be formed by radial migration of excitatory neurons and would maintain its collothalamic innervation.