Effects of performance expectancies created by peer comparison as related to social reinforcement,task difficulty,and age of child

Children in kindergarten-first grades and fourth-sixth grades (6 and 10 years of age, respectively) participated in one of two experiments and performed either a simple motor task or (for older children only) a two-choice simultaneous discrimination task at two difficulty levels. Children received either positive, negative, or no peer comparison statements (describing how other children their age had allegedly performed) and either praise, silence (in Experiment 2 only), or criticism on a fixed-interval 20-second schedule throughout the task. Young children were more responsive to adult evaluation of their performance than to peer comparison. Expectancies created by peer comparisons affected older children's motor performance most if they received reinforcement contrary to the expectancy. In situations requiring greater cognitive ability, older children, particularly boys, responded to the performance expectancies created by positive peer comparison. Older boys, compared with older girls, seemed to be more sensitive to peer comparison and social reinforcement.     

Fourier analysis of polar coordinate data in visual physiology and psychophysics

Techniques are presented for analyzing data collected as a function of: a circular independent variable (e.g., angle, direction, or orientation) or an independent variable which is cyclical (e.g., months of the year). The procedures are presented in a tutorial manner, emphasizing their relationship to more traditional statistics in experimental psychology.     

Synonym comprehension and the generality of categorization models

Memory & Cognition - When subjects classify a two-word display as representing the “same” category or two “different” categories, semantic similarity between the words...     

Comparing the Effects of Informational,Role-playing,and Value-discrepancy Treatments on Racial Attitude1

Previous studies of educational approaches to reducing ethnic prejudice have suffered due to the confounding of techniques that could account for the results obtained. The present study was designed to overcome this problem by testing the effectiveness of three separate and relatively unconfounded educational treatments: informational, which presented evidence challenging the current stereotype that blacks generally trail whites in socioeconomic achievement because they are lazy; role playing, in which subjects wrote an essay urging that good jobs be created to help the poor advance; value-discrepancy, which pointed out that the subjects valued their own freedom more than the welfare of others and that such values worked against minorities. These three treatments and a control condition were administered to intact classes at an eastern, nearly all-white college. A measure of antiblack prejudice administered immediately after the experimental inductions showed the three treatment groups to be significantly lower in prejudice than the control group. On a delayed posttest the treatment groups were still lower in prejudice than the control group though the difference was not significant. The demand characteristics counter-explanation for the results on the immediate posttest was evaluated and found not supported, thus suggesting the potential efficacy of the three treatments.     

Transcortical motor aphasia: One or two aphasias?

The name "transcortical motor aphasia" has been used to refer to two different types of language alterations: damage in the left supplementary motor area and Luria's dynamic aphasia. It is proposed that they represent two types of language disturbances different enough to be considered two different forms of aphasia.     

Counsellor Interventions in Organisations

A counsellor occupies a potentially facilitative role in an organisation. Ways in which the counsellor can facilitate the development both of individuals and of the organisation of which they are members are discussed and are related to organisational transitional change and fantasy life. Possible interventions with individuals, groups and the organisation are outlined with the accent on development.