Methylphenidate Improves Autonomic Functioning among Youth with Attention-Deficit/Hyperactivity Disorder

Research on Child and Adolescent Psychopathology - Psychostimulants are commonly prescribed medications for youth with attention-deficit/hyperactivity disorder (ADHD). Limited studies have...     

Modeling human performance in statistical word segmentation

The ability to discover groupings in continuous stimuli on the basis of distributional information is present across species and across perceptual modalities. We investigate the nature of the computations underlying this ability using statistical word segmentation experiments in which we vary the length of sentences, the amount of exposure, and the number of words in the languages being learned. Although the results are intuitive from the perspective of a language learner (longer sentences, less training, and a larger language all make learning more difficult), standard computational proposals fail to capture several of these results. We describe how probabilistic models of segmentation can be modified to take into account some notion of memory or resource limitations in order to provide a closer match to human performance.     

Exertion–Attention–Flow Linkage Under Different Workloads

This study explored a proposed conceptual scheme examining the relationship between perceived exertion, flow, and the attention strategies of association and dissociation. After establishing a maximal baseline, 60 rowers performed at 30%, 50%, and 75% of maximal workloads for 10 min on a rowing ergometer. Results revealed that as workload increased, attention shifted from dissociation to association. Flow also showed a change in endorsement of the 9 dimensions. We found a main effect for gender, but not for experience. Women exhibited higher global flow than did men during the 75% and maximal sessions. Results lend preliminary support for the proposed conceptual scheme in which perceived effort affects attention focus and flow experience. Applied recommendations for coaches and athletes are presented.     

The Role of Defense Mechanisms in Borderline and Antisocial Personalities

Fifty-eight adult male felons were given the Minnesota Multiphasic Personality Inventory (MMPI), the Buss-Durkee Hostility Inventory (BDHI), and the Draw-a-Person Test (DAP) to test the relative sensitivity of subtlety or obviousness of items to response Sets. The inmates were randomly assigned to three response set groups: a fake-aggressive group, a fake-nonaggressive group, and a standard-instruction control group. The MMPIs were scored for five obvious and five subtle aggression or hostility research scales. The BDHI is a totally obvious test, whereas the DAP is a very subtle measure. A paradoxical relationship between response set and subtlety of the scales was hypothesized, such that the obvious scales could be successfully faked, hut the subtle scales would show scores in the opposite from the intended direction. It was found that the inmates did correctly manipulate the obvious scales, but the subtle scales did not consistently show the hypothesized trend. Possible reasons for this are discussed, including the nature of the scales used and characteristics of the population.     

BODY WORLDS: Choosing to Be Immortalized as an Educational Specimen

Research ethics education in the biosciences has not historically been a priority for research universities despite the fact that funding agencies, government regulators, and the parties involved in the research enterprise agree that it ought to be. The confluence of a number of factors, including scrutiny and regulation due to increased public awareness of the impact of basic research on society, increased public and private funding, increased diversity and collaboration among researchers, the impressive success and speed of research advances, and high-profile cases of misconduct, have made it necessary to reexamine how the bioscience research community at all levels provides ethics education to its own. We discuss the need to and reasons for making ethics integral to the education of bioscientists, approaches to achieving this goal, challenges this goal presents, and responses to those challenges.     

The effect of perceived stress on the relationship between perfectionism and burnout in coaches

Abstract

The effects of perceived stress (PS) on the relationship between adaptive and maladaptive forms of perfectionism and burnout were examined. Smith's (1986) stress appraisal model and Kelley, Eklund, and Ritter-Taylor's (1999) model of coach burnout were used to test two models of burnout in a sample of college coaches (N=177). The results indicated that there is an indirect effect of self-evaluative perfectionism (i.e., maladaptive form of perfectionism) on burnout through PS as well as a significant direct link to burnout, accounting for 56% of its variance. In contrast, conscientious perfectionism (CP) (i.e., adaptive perfectionism) did not directly impact burnout, nor was there an indirect effect through PS. Based on Lazarus's (1999) ideas about stress appraisal, the results suggested that maladaptive forms of perfectionism resulted in more threatening perceptions of stress, thus, potentially leading to the experience of burnout. However, adaptive forms of perfectionism did not seem to result in increased appraisals of stress or result in burnout. The results did indicate a significant correlation between the two forms of perfectionism, which may explain why CP did not significantly impact PS or burnout.     

Quasi-Realism's Problem of Autonomous Effects

Simon Blackburn defends a 'quasi-realist' view intended to preserve much of what realists want to say about moral discourse. According to error theory, moral discourse is committed to indefensible metaphysical assumptions. Quasi-realism seems to preserve ontological frugality, attributing no mistaken commitments to our moral practices. In order to make good this claim, quasi-realism must show that (a) the seemingly realist features of the 'surface grammar' of moral discourse can be made compatible with projectivism; and (b) certain realist-sounding statements which we might use in describing the nature of our moral commitments can be understood in projectivist terms. Much attention has been devoted to whether quasi-realism can deliver (a). I raise an important difficulty with regard to (b).