Study Of Environmental Influences Research Articles

The relevance of the concept of nonshared environment to the study of environmental influences: A paradigmatic shift or just some gears slipping?

The relevance of the concept of nonshared environment to the study of environmental influences: A paradigmatic shift or just some gears slipping?

The alternative institution: A small group study of environmental influence on sex‐role interaction style

To explore the impact of an alternative institution on small group interaction, a participant observer field study was conducted in a counter‐culture free school. Focusing on the communication behavior males and females display in small groups, it was hypothesized that learners and teachers would deviate from conventional sex role interaction styles in a nonsexist environment. The results indicated, however, that students conformed to traditional sex role expectations and teachers did not. The difficulty in modifying sex linked communication patterns is also discussed.

A study of environmental influence upon salivary gland neoplasia in rats.

An animal model system was used in an attempt to explore suspect relationships between 3 groups of possible carcinogenic co-factors (nutritional, endocrine, and thermal) and the seemingly high salivary gland cancer experience of Arcticdwelling Eskimos. Two hundred and thirty weanling Sprague-Dawley rats were randomized into 7 groups to study effects of vitamin A deficiency, hypercortisonism, hyperthyroidism, hypercortisonism plus hyperthyroidism combined, and a windy, cold, humid environment upon submaxillary salivary glands challenged with implanted 20 percent 7,12-dimethylbenzanthracene pellets. Animals were sacrificed at 14 weeks. Of the 7 regimens, only vitamin A deficiency increased malignant epithelial neoplasm yield. Increased yield in vitamin A deficient group (I) compared to the sum of nutritionally adequate control groups (II and III) was significant at the 0.001 level, and with all groups II-VII individually (p = 0.0001) or combined (p = 0.00004). No significant yield difference was found among the other 6 groups (II-VII).

Environmental Influences on Prenatal Development

This useful and interesting book consists of the proceedings of one of the Developmental Biology Conference Series held under the auspices of the National Academy of Sciences and the National Research Council. The conference was held at the Roscoe B. Jackson Memorial Laboratory in Bar Harbor, Maine and was attended by about 20 authorities from the United States and Europe. One means for study of environmental influences on development consists of an examination into the causes of morphologic abnormalities. The book begins with some consideration of such defects.

A critical examination of the University of Iowa studies of environmental influences upon the IQ.

A critical examination of the University of Iowa studies of environmental influences upon the IQ.