Arousal and stereotype threat

Seemingly insignificant features of the context can undermine the quantitative performance of skilled females—an effect attributed to stereotype threat. The present studies tested the hypotheses that stereotype threat triggers arousal, and that attributions about that arousal could moderate the effects of stereotype threat on performance. To examine whether arousal is triggered by stereotype threat, we conducted two experiments in which female participants were asked to take a math test under conditions of stereotype threat or not. In Study 1, women under stereotype threat performed better on an easy threat-irrelevant task, but worse on a difficult threat-irrelevant task than women not under threat. In Study 2, threatened women underperformed on a math test, but this underperformance was attenuated for women directed to misattribute their arousal. These results suggest that arousal—and how arousal is attributed—may play an important role in the debilitating effects of stereotype threat.     

Reflections on Ethics and Game Theory

Applications of game theory to moral philosophy are impededby foundational issues and troublesome examples. In the first part of this paper,questions are raised about the appropriate game-theoretical frameworks for applications to moralphilosophy and about the proper interpretations of the theoretical devices employed inthese frameworks. In the second part, five examples that should be of particular interest to thoseinterested in the connections between ethics and game theory are delineated and discussed. Thefirst example comprises games in which there is an outcome unanimously preferred to the``solution' of the game, appropriately defined. The second comprises games whose solution callsfor different players to employ different strategies. The third comprises games whosesolution calls for players to adopt mixed strategies. The fourth comprises games whose solutionrequires players to cycle among a variety of strategies. The fifth comprises games whose solutionrequires players to discriminate in morally inappropriate ways.     

The transition form theory to therapy: Test of two instructional methods

This study compared college students' understanding of the role of three language learning theories (operant, sociolinguistic, cognitive) in language theory through two instructional methods: video-based anchored instruction and traditional classroom instruction. Results indi-cated no significant difference between the performance of students in the two instructional groups on the post-test while students who received anchored instruction scored significantly higher on two transfer tests than students who received the traditional instruction. Video-based anchored instruction was found to be a valuable instructional tool which increased students' understanding of theoretical principles; through observations they experienced abstract theoretical principles as the foundation for clinicians' actions and interactions with language-impaired children.     

Apraxia in a patient with atypical cerebral dominance

Liepmann postulated that the left hemisphere of right-handed persons contains the "movement formulas" that control purposeful skilled movements of the limbs on both sides of the body. Accordingly, in right-handers apraxia should follow damage to the left hemisphere, whereas right hemisphere damage should not lead to apraxia. Although this is generally true, we recently examined a right-handed man who after a right hemispheric stroke became aphasic and apraxic with his nonparalyzed right hand. Our observations suggest that the right hemisphere of this right-handed man made a critical contribution to the planning and execution of skilled movements. This case provides evidence that right-handers should not be considered a homogeneous group in terms of cerebral motor dominance and that contrary to Liepmann's postulate, hemispheric dominance for the control of skilled movements does not entirely determine handedness.     

Semantic Determinants and Psychology as a Science

One central but unrecognized strand of the complex debate between W. V. Quine and Donald Davidson over the status of psychology as a science turns on their disagreement concerning the compatibility of strict psychophysical, semantic-determining laws with the possibility of error. That disagreement in turn underlies their opposing views on the location of semantic determinants: proximal (on bodily surfaces) or distal (in the external world). This paper articulates these two disputes, their wider context, and argues that both are fundamentally misconceived. There is no special tension between error and strict semantic-determining laws; moreover, the purported bearing of that issue on the dispute over the location of semantic determinants depends upon a mistaken conception of the relation between the nomic status of generalizations and degree of distance between explanans and it explananda. Finally, the wider significance of these conclusions for related contemporary debates is noted. And independent considerations about the possibility of communication, also present in Quine's and Davidson's thinking, are brought to bear on the question of the location of semantic determinants. This revised version was published online in August 2006 with corrections to the Cover Date.     

Gender,Marriage, and Suicide Acceptability: A Comparative Analysis

The previous work on suicide acceptability hasneglected gender specific analysis of the marriagesuicide acceptability linkage as well as cross-nationalanalysis. The present study fills these gaps in the literature through an analysis of 15nations. Controlling for alternative predictors ofsuicide acceptability, marriage lowers suicideacceptability for both males and females. Further,marriage lowers suicide acceptability more for men than forwomen. This gendered relationship has the same strengthin nations both high and low in economic genderequality. The results provide the first comparativeevidence on the subject. The findings support the notionthat men derive relatively more benefits from marriagethan women. However, the strongest correlates of suicideacceptability (e.g., religiosity, liberalism, French residence) affect men and womenequally.     

Sources of Dual-Task Interference: Evidence From Human Electrophysiology

When an individual attempts to perform two tasks at the same time, the tasks often interfere with each other. This interference has been studied for several decades with the psychological refractory period paradigm, in which two targets that require independent responses are presented on each trial, separated by a variable delay period; interference typically takes the form of increased response times for the second target at short interstimulus delays. The present study used electrophysiological recordings to determine whether a specific index of perception and categorization (the P3 wave) is delayed in the same manner as response times. Although response times for the second target were found to be greatly delayed at short interstimulus intervals, the P3 wave was not substantially delayed. This finding indicates that there was minimal interference during target identification and categorization and that the prolongation of response times in this paradigm primarily reflects a delay in a relatively late process, such as response selection.     

Retrospective Revaluation and Inhibitory Associations: Does Perceptual Learning Modulate our Perception of the Contingencies Between Events?

The reported experiments seek to reconcile the conflict between proposed explanations of retrospective revaluation of contingency judgements in experiments with humans (e.g. Dickinson & Burke, 1996) and those of a perceptual learning phenomenon discovered in rats (Espinet, Iraola, Bennett, &Mackintosh, 1995). The experiments employ a medical diagnosis scenario, in which subjects are asked to judge whether particular symptoms signal the presence or absence of a fictitious disease. In Experiment 1, following alternating exposure to pairs of symptoms, AX and BX, subjects were informed that symptom A was predictive of illness. As a result of this training, subjects rated symptom B as predictive of the absence of the illness. In Experiment 2, a possible mechanism behind this effect was considered. In particular, it was established that pre-exposure in which the AX pair reliably preceded the BX pair produced the same pattern of results as those shown in Experiment 1. In contrast, when the order of pairs was reversed, so that BX reliably preceded AX, the reduction in ratings for symptom B was not obtained. Several extant associative theories are discussed, but none are found to account adequately for this pattern of results. To overcome these inadequacies, a parsimonious theory is suggested that explains all the effects observed in these experiments.