Avoiding the Conditional Fallacy

Over-simple internalist accounts of practical reasons imply that we cannot have reasons to become more rational, because they claim that we have a reason to φ only if we would have some desire to φ if we were fully rational. But if we were fully rational, we would have no desire to become more rational. Robert Johnson has recently argued that in their attempts to avoid this problem, existing versions of internalism yield reasons which do not have an appropriate connection with potential explanations of action. I suggest that the problem is partly a result of failure to see that action-tokens are usually tokens of a wide variety of action-types, and that the internalist conditional need only be true of one of these types in order to justify a reason claim about the token.     

Early stopping of clinical trials: charting the ethical terrain

The decision to terminate a clinical trial earlier than planned is often described as ethically problematic, but it is rarely systematically analyzed as an ethical issue in its own right. This paper provides an overview of the main ethical considerations at stake in such decisions and of the main tensions between these considerations. Arguments about informed consent and the impact of early stopping on research and society are explored. We devote particular attention to a familiar conflict that arises with special urgency when early data suggest that the experimental treatment is superior. Should the trial be stopped so that participants in the control group will not be allocated a seemingly inferior treatment, or should it continue in pursuit of evidence conclusive enough to improve the care of future patients? We scrutinize three ways to address this problem. Rather than dissolving the tension, they represent different trade-offs between the respective welfare interests of subjects and future patients.     

A neuroconstructivist model of past tense development and processing

We present a neural network model of learning and processing the English past tense that is based on the notion that experience-dependent cortical development is a core aspect of cognitive development. During learning the model adds and removes units and connections to develop a task-specific final architecture. The model provides an integrated account of characteristic errors during learning the past tense, adult generalization to pseudoverbs, and dissociations between verbs observed after brain damage in aphasic patients. We put forward a theory of verb inflection in which a functional processing architecture develops through interactions between experience-dependent brain development and the structure of the environment, in this case, the statistical properties of verbs in the language. The outcome of this process is a structured processing system giving rise to graded dissociations between verbs that are easy and verbs that are hard to learn and process. In contrast to dual-mechanism accounts of inflection, we argue that describing dissociations as a dichotomy between regular and irregular verbs is a post hoc abstraction and is not linked to underlying processing mechanisms. We extend current single-mechanism accounts of inflection by highlighting the role of structural adaptation in development and in the formation of the adult processing system. In contrast to some single-mechanism accounts, we argue that the link between irregular inflection and verb semantics is not causal and that existing data can be explained on the basis of phonological representations alone. This work highlights the benefit of taking brain development seriously in theories of cognitive development.     

Pornography, Individual Differences in Risk and Men’s Acceptance of Violence Against Women in a Representative Sample

Based on the Confluence Model of Sexual Aggression, we hypothesized that individual differences in risk for sexual aggression moderate the association between pornography use and attitudes supporting violence against women. This hypothesis was in keeping with the findings of a recent meta-analysis which indicated such a positive association between porn use and attitudes. However, in this meta-analysis there was also a high degree of heterogeneity among studies, suggesting the existence of crucial moderating variables. Unfortunately, the available literature included in this meta-analysis did not enable identifying the basis for such moderation. To fully test our hypothesis of individual differences moderation and related hypotheses requires a representative sample. Fortunately, a unique nationally representative sample of U.S. men in any form of post-high school education that we obtained in 1984–85 enabled testing our predictions. Participants had anonymously completed questionnaires that included items pertaining to pornography use, attitudes about violence against women, and other measures assessing risk factors highlighted by the Confluence Model. As predicted, while we found an overall positive association between pornography consumption and attitudes, further examination showed that it was moderated by individual differences. More specifically, as predicted this association was found to be largely due to men at relatively high risk for sexually aggression who were relatively frequent pornography consumers. The findings help resolve inconsistencies in the literature and are in line not only with experimental research on attitudes but also with both experimental and non-experimental studies assessing the relationship between pornography consumption and sexually aggressive behavior.     

The instantiation principle re-evaluated

Three experiments are presented in which different aspects concerning Heit and Barsalou's (1996) instantiation principle were investigated. Mean typicalities of subordinate categories within superordinates were predicted very accurately for all investigated concepts. Multiple instantiations were shown to yield somewhat better predictions than single instantiation. The instantiation principle also successfully predicted mean typicalities on a different level (i.e., in lower-level concepts). An alternative account of Heit and Barsalou's findings was also proven wrong. Finally, correspondence between empirically obtained and predicted standard deviations is argued to be dubious, because of several possible sources of bias in the observed and predicted values.     

Wittgenstein,Korsgaard and the Publicity of Reasons

In The Sources of Normativity (Korsgaard, Christine. The Sources of Normativity. Cambridge: Cambridge University Press, 1996), Christine Korsgaard tried to argue against what she called the ‘privacy’ of reasons, appealing to Wittgenstein's argument against the possibility of a private language. In recent work she continues to endorse Wittgenstein's perspective on the normativity of meaning, although she now emphasizes that her own argument was only meant to be analogous to the private language argument. The purpose of the present paper is to show that the Wittgensteinian perspective is not only not useful in support of Korsgaard's general project, but that it is positively inimical to it, in two ways. First, Wittgenstein opposes views on which principled or rule-following behavior requires that one be guided by anything like a mental representation of a rule or principle. But for Korsgaard, human action essentially requires this. Second, Wittgenstein systematically attempts to de-emphasize the importance of the first-personal perspective, and to emphasize the social functions even of concepts that might seem deployed primarily from that perspective: for example, concepts of sensations and intentions. This is the reverse of Korsgaard's emphasis. The paper also argues, however, that the private language argument does have some implications for a theory of rationality and reasons.     

Psychiatry in the labyrinth: Deconstructing deviancy

Abstract

Deviancy is a key concept in psychiatry and other therapeutic disciplines, because it dramatizes the way in which they depend on the establishment of norms, in order to justify their theory and practice. The writings of Derrida as well as Goethe provide a different view: that “deviation” from a “norm” can be fundamentally important to the well‐being of the norm. Thus deviancy can be viewed not as something to be “corrected” but rather as a creative possibility to be encouraged and shaped in productive ways. As a case of “deviancy” we have selected the writings of John Perceval, whose Narrative provides a critique of the mental‐health establishment of his day, particularly the asylum, and offers an alternative to 19th‐century views of “lunacy.” We see his “schizophrenic” commentary on his “psychosis” and its treatment as analogous to the deconstructive, “schizophrenic” discourse of postmodernity which is similarly critical of the reigning, modernist psychiatric order.     

Geometric and featural representations in semantic concepts

We explore the adequacy of two types of similarity representation in the context of semantic concepts. To this end, we evaluate different categorization models, assuming either a geometric or a featural representation, using categorization decisions involving familiar and unfamiliar foods and animals. The study aims to assess the optimal stimulus representation as a function of the familiarity of the stimuli. For the unfamiliar stimuli, the geometric categorization models provide the best account of the categorization data, whereas for the familiar stimuli, the featural categorization models provide the best account. This pattern of results suggests that people rely on perceptual information to assign an unfamiliar stimulus to a category but rely on more elaborate conceptual knowledge when assigning a familiar stimulus.