Author summarizes assumptions underlying research into human processing of probabilistic information used in decision-making. He outlines a model for further studies, noting that why subjects may reject it is as important as whether they do so. Theoretical prospects are discussed also. (Author/PD)

Study conducted while the author was the recipient of a National Institute of Mental Health Postdoctoral Fellowship and supported, in part, by an Office of Education Research Grant. (VM)

Article rebuts the theory that known sex differences in cognitive abilities reflect sex-related differences in physiology". (Author/ML)

The development of multiplicative classificatory skills in children between 4 and 9 years of age was investigated by means of two forms of the matrix-completion task. (Authors)

The ability to order objects in a series according to some dimension, such as size, is recognized as an important aspect of a child's ability to understand logical concepts. (Author)

A study supporting the contention that opinionation in a persuasive message functions conjointly with the personality variable approval-dependence, to produce differential effects on recipient attitude change. (Author)

This study was conducted to provide additional insight into the functioning of authority-based assertion by controlling to a large extent other relevant variables. This control made possible a test of the interaction of authority-based assertion with critical thinking ability. (Author)

Ninety-six student pilots were trained on a range-estimation task, either by a trial-and-error method or by an errorless method. (Author)

Directions are provided for the construction of a reduced size Rod and Frame Test. Simpler and less expensive, the proposed apparatus has criterion validity parallel to that of the full-sized. (GS)

The most striking finding is that schizophrenic women appear capable of creating, at will, favorable or unfavorable impressions. These results support the idea that schizophrenics can be effective in some social situations. The existance of individual differences in schizophrenic women's interpersonal skills was only partially supported.…

The discussion is organized around the following five broad principles: (1) The source of educational relevance is the analysis of coping behavior. (2) Generalization and differentiation are the cutting edges of the educational process. (3) The learner is an active and affect-generating element of the learning situation. (4) Man is a…