Endogenous Covert Spatial Orienting in Audition Cost-Benefit Analyses of Reaction Times and Event related Potentials

The presentstudy examines mechanisms ofendogenous covertspatialorienting inaudition as revealed by event-related brain potentials (ERPs) and reaction times (RTs). In one experimental condition, subjects were instructed to respond to any target tone irrespective of whether it was presented in a valid (spatially predictive cue), neutral (uninformative cue), or invalid (misleading cue) trial. In another experimental condition, only target tones presented at a cued position required a response-that is, subjects could completely ignore tones presented at the uncued ear. Cue validity had an effect on RT, which consisted in benefits for valid trials and in costs for invalid trials relative to the RTs in neutral trials. There were also distinct ERP effects of cue validity in the 100-300 msec time range. These ERP effects were enlarged in the condition in which uncued tones could be ignored. The effects of cue validity onRTsandERPsdemonstratedcovertorientinginauditionbothforstimulirequiring anovert response andalso for stimuli that did not require a behavioural response. It is argued that this attentional selection is located at intermediate stages of information processing, rather than at peripheral stages such as basic sensory-specific processing or response selection.     

Bulimia,dietary restraint,and concern for dieting

The concept of dietary restraint has recently been used to explain binge-eating in dieters. It has been proposed that the violation of various restraint rules typically leads to hinging in individuals exhibiting high dietary restraint. This study examined the role of dietary restraint in a clinical sample of bulimics. After eating a preload to break dietary restraint, bulimic binge-eaters (those who binge but do not purge) were found to eat significantly more than bulimics who binged and purged (bulimia nervosa) and significantly more than normals. In addition, purging bulimics were found to have more concern about dieting than binge-eaters, while normals were found to have less concern about dieting and less anxiety about eating than both bulimic groups. These data suggest that the psychopathology of bulimia nervosa and bulimia (binge-eating) may be substantially different. It was proposed that the most distinguishing characteristic may be the preoccupation with dieting, weight, and body size, which is more extreme in bulimia nervosa.     

The use of the position analysis questionnaire in selecting correlates of job performance among mentally retarded workers

The present study investigated the efficiency of various existing measures, mainly psychological tests, for predicting job performance of mentally retarded workers in a sheltered occupational shop. Twenty-two production-related jobs and one nonproduction-related job were analyzed with the Position Analysis Questionnaire resulting in two job attribute clusters. Correlations between 19 predictor variables and 5 criterion variables, which consisted of supervisor ratings of job performance, were then calculated separately for subjects performing preferred jobs in each attribute group. The results indicated that, contrary to past research, existing measures are predictive of performance on some but not all jobs in a sheltered workshop.     

Behaviour in group situations: An integrative model

As in other areas of research we have in small group research classical studies with a paradigmatic character. These separated studies define the basic knowledge. But what is necessary is to combine these classical studies and to construct a theoretical concept which shows the similarities and dissimilarities between them. This is the main intention of the paper. The theoretical concept tries to reconstruct the now classical data from a model with normative and in formational components. Both king of components are integrated hierarchically with the normative elements as antecedent variables and the weights of the information integration as dependent variables. With the help of the model it is possible to reconstruct data in such different areas as, e.g. social facilitation, autokinetic effect, Asch conformity studies, Milgram conformity studies, equity theory studies, prisoner's dilemma. As predictions research in the choice-shift and the wage negotiation are presented. Finally, the connection with the research in social cognition is established by a reconstruction of classical study from the aspiration level and the dissonance theory.     

The uncertainty of certainty in clinical ethics

Physicians accept fallibility in technical matters as a condition of medical practice. When it comes to moral considerations, physicians are often loathe to act without a good deal more certitude and seem less willing to accept error. This article argues that ethics is intrinsic to medical decision making, that error is the inevitable risk of any action and that inaction (clearly action by default) carries even greater risk of error. Whether in the moral or the technical sphere, error must be accepted by physicians as part of the learning process which informs and enriches future decisions. Moral virtue, it is concluded, resides more in the making of a decision and in the agony of making it than it does in the potentially fallible decision itself.     

Köhler rediscovered: The anti-ringelmann effect

A current focus of research on individual versus group performance is social loafing, the decrease in individual effort that occurs when the individual works within a cooperative group rather than alone. This result is also referred to as the ‘Ringelmann effect’. But what has been ignored until now is the increment in group performance through systematic variation of individual performance rates within the group, although this effect was reported by Moede (1927) in the same article which influenced research on the Ringlemann effect. Within a narrow range of performance rates from 4.5 to 3.5 in dyads Kohler found an increase in group performance to a level above that of the individual performances. Kohler obtained comparable results from 3–person, and 4–person groups using the experimental procedure of weight lifting and winch turning. This phenomenon should be called the ‘Kohler effect’; although it is still to be replicated with modern ergometers.     

Salience of arousal as a mediator of misattribution of transferred excitation

An experiment was conducted to test Zillmann's hypothesis that misattribution of residual arousal in the excitation transfer paradigm is influenced by the salience of perceived arousal symptoms at the point of potential misattribution. Eighty subjects in a 2×2×2 design were either physiologically aroused or not aroused, and were subsequently subjected to a procedure designed to induce either positive mood (elation) or negative mood (depression). Simultaneously, they were either made self-aware or not. It was reasoned that self-focused attention would lead to heightened awareness of residual arousal and that, if the salience of arousal hypothesis is correct, this would prevent misattribution of arousal and the resultant intensification of experienced emotion from occurring. In accord with this reasoning, it was found that aroused and self-aware subjects experienced residual arousal significantly more intensely, were less prone to misattribute it, and did not show an excitation transfer effect. These results were, however, obtained only for subjects in the negative mood condition.