The effect of knowledge of results on learning and performance IV. the direction of the error in very simple skills

Re-examination of the data discussed in previous papers of this series shows a greater tendency toward “overshooting” when the time interval between trials, in some of the experiments, is short than when it is longer. The subject tends to make a bigger movement or exert more pressure with short intervals. This seems to be true with or without visual knowledge of results. On the other hand, with the experiments in which the task was to press a key for a given short interval, the effect was not conclusively shown.

A hypothesis is put forward to explain these results in terms of proprioceptive adaptation.     

Better brains, better selves? The ethics of neuroenhancements

The idea of enhancing our mental functions through medical means makes many people uncomfortable. People have a vague feeling that altering our brains tinkers with the core of our personalities and the core of ourselves. It changes who we are, and doing so seems wrong, even if the exact reasons for the unease are difficult to define. Many of the standard arguments against neuroenhancements--that they are unsafe, that they violate the distinction between therapy and enhancements, that they undermine equality, and that they will be used coercively--fail to show why the use of any such technologies is wrong in principle. Two other objections--the arguments that such changes undermine our integrity and that they prevent us from living authentic lives--will condemn only a few of the uses that are proposed. The result is that very few uses of these drugs are morally suspect and that most uses are morally permissible.     

Self-Determination Skills of Adolescents Enrolled in Special Education: An Analysis of Four Cases

This study provides information about four adolescent students participating in an occupation-based self-determination program drawn from the Model of Self-Determination and the Model of Human Occupation. Students were selected from a Career Lab based on their ability to participate. The analysis of the cases demonstrate that psycho-educational strategies incorporated into a special education curriculum can instill in the students the knowledge, attitudes, and behaviors necessary for personal goal setting and attainment.     

Risk factors in child maltreatment: A meta-analytic review of the literature

This review presents the results of a series of meta-analyses identifying the relative strength of various risk factors for child physical abuse and neglect. Data from 155 studies examining 39 different risk factors were included in the review. Large effect sizes were found between child physical abuse and three risk factors (parent anger/hyper-reactivity, family conflict and family cohesion). Large effect sizes were also found between child neglect and five risk factors (parent–child relationship, parent perceives child as problem, parent's level of stress, parent anger/hyper-reactivity, and parent self-esteem).