This paper examines the effects of unavoidable pollutants on fetal development in humans. Inevitable pollutants such as radiation, pesticides, gases and lead found in the air, water, and food of our industrialized society are discussed as well as psychological correlates of industrialization and urbanization such as stress, increased noise levels…

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…

This study manipulated the relations between target and cue words in two cued-recall experiments with children based on the assumptions that: (1) the target cue relations that are most consistent with a child's semantic memory organization result in the highest levels of recall, and that (2) the optimal target-cue relationships may change with…

This document reorts on an educational research study involving 75 eighth-grade students to determine the effects of problem solving instruction on the ability of students to apply proportional reasoning in problem situations. Results suggest that changes in basic reasoning skills such as proportional reasoning are long term, highly dependent on…

This paper describes two studies which investigated the development in elementary school children of the ability to derive inferences about the subjective states (physiological and psychological) of others. A cued recall procedure was utilized to assess the relative effectiveness of implicitly or explicitly stated emotional states as cues for…

The effectiveness of audiotutorial and teacher-directed inquiry in promoting school achievement was explored. High school biology students from two dissimilar populations were administered ten Piagetian-styled tasks to determine the student's operational level. Analysis of data on operational level and age determined that inner-city students…

This study examined the relationships between cognitive development, language acquisition, and socioeconomic class, as manifested in children's written language. Four classes of sixth-grade students participated in the investigation, a control class and an experimental class from each of two socioeconomic environments (low and high). The treatment…

The study compared the level of development observed in the imaginative play of young children with the level of development revealed in conservation an classification tasks. The sample included 40 children, with one 5/6-year old group of 20 children (10 boys, 10 girls), and two six/seven-year old groups of 20 children (14 boys, 6 girls). The…

It was hypothesized that children, like adults, cognize social groups by applying social schemata. Their facility with social schemata was predicted to be a function of their level of cognitive development. When children were asked to complete partial social structures, formal and concrete operational, but not preoperational children, readily…

The conference papers in this collection emphasize the theoretical significance of their authors' work in the areas of mathematical and cognitive psychology. Major topics considered include facilitation of problem solving; psychological differences among problem isomorphs; the process of understanding in problem solving; processing information for…

Developing learning-teaching procedures is only possible if one knows the internal processes to be formed. Two 'psycho-logical' models and activity algorithms for foreign language teaching are discussed. Construction of such operational models for grammatical action has a high diagnostic value for research and development in FL teaching. See FL…

In one experiment, children from 5 to 10 years of age played with puppets and responded to questions concerning the acquisition of one particular linguistic structure by children; in another series of experiments, both children and adults responded to questions regarding nonsense words in differentiating contexts--the focus of the discussion…

Research findings related to the development of language, abstract reasoning, and problem solving-skills by children from three to eight years old are integrated by consideration of classroom implications. Individual differences, the teacher-child relationship, and other topics are also discussed in this context. (SD)

After a discussion on planning instruction, a series of activities designed to develop pre-number and number concepts are presented. Activities are arranged by difficulty within sections devoted to classifying, comparing, ordering, measuring, organizing data, distinguishing shape and size, recognizing patterns, number awareness, and counting. (SD)