This document presents Part I of a two-part study which sought to ascertain the relationship of grade level, achievement level, sex, and method of presentation to the various bases by which children classify geometric concepts. Two tasks, administered consecutively to 96 subjects in grades five, eight and eleven, consisted of the sequential…

This document, Part II of a two-part study, is the summary chapter of a report which sought to ascertain the relationship of grade level, achievement level, sex, and method of presentation to the various bases by which children classify geometric concepts. Two tasks, administered consecutively to 96 subjects in grades five, eight, and eleven,…

An ecological method was used to assess the patterns of goal-directed behaviors of eight children with autism and eight chronological and mental age comparable children with Down syndrome. Analysis of quantitative and qualitative behavior coding indicated that children with autism exhibited shorter and less overlapping goal-directed behaviors,…

Discriminating what is pretense from what is real is a fundamental problem in development. Research has addressed the proficiency with which adults and children discriminate between play fighting and real fighting, and yet none (to our knowledge) has investigated discrimination of other kinds of pretense and real acts. In addition, little is known…

Recent experimental research is synthesized to identify distinctive biobehavioral characteristics of Down's Syndrome persons across their lifespan. It is argued that educational and other intervention programs have not demonstrated strong gains having significant durability or generalization. Recommended is an interactionist function-structure…

Assessed the relationship between temporally distant antecedent events (TDEs) and the frequency and function of aggressive and out-of-seat behaviors occurring in school. Results were consistent with previous literature that describes certain antecedent events as establishing operations. Discussion includes how these events interact to alter the…

Delivered at XI Interamerican Congress of Psychology; Sociedad Interamericana Psicologia and Texas Psychological Association, Mexico, D.F., December, 1967.

Outlines a dual model of cognitive development in which patterns of cultural stimulation are reconstructed in the child's cognition. It provides a mathematical language for the representation of structures in sensorimotor actions and verbal explanations as they occur in the context of the everyday life of the child. (Author/RH)

Two studies investigated the role that parental attitudes and behavior play in filtering the complexity of the world into manageable forms for children. Cognitive and behavioral patterns used as dependent variables were cognition (reading scores, language use, general information, beliefs, reality-fantasy discrimination); imagination;…

Explores children's understanding of a variety of interpersonal events, focusing mainly on the question of whether, and in what way, their conceptions of these events were heterogeneous or undifferentiated. (HOD)

Tests of executive functions and control tasks not assessing executive function were administered to 19 individuals (ages 6-28) mild hyperphenylalaninemia (MHP) and 19 controls. Tests of academic skills and behavior-rating questionnaires were also administered to the group with MHP. No group differences were found for any measure. (Contains…

The Matching Family Figures Test (MFF) is examined in order to show that a wide variety of rational speed-accuracy trade-offs ranging from impulsive to reflective are quite plausible. Ten children (mean age, eight years) took part in the experiment. Five had previously been classified on the basis of the MFF as impulsive, five as reflective. On…

The study reported in this paper traces the nature of the changes which take place as the child gradually acquires perspective-taking skills. The results indicate that at first the young child can correctly represent only the location of the object nearest another observer; later, he can correctly represent a before-behind relationship between…