Understanding the function of the distinct amygdaloid nuclei in learning comprises a major challenge. In the two studies described herein, we used c-Fos immunolabeling to compare the engagement of various nuclei of the amygdala in appetitive and aversive instrumental training procedures. In the first experiment, rats that had already acquired a…

The impact of age effects on nonverbal memory for auditory or tactual patterns has been largely neglected in research studies. The effects of age on nonverbal memory were investigated by comparing subjects (N=120), divided by age decades into six groups (N=20), through tests using visual, auditory, and tactual items which were resistant to verbal…

Forty undergraduate college students participated in a computer-assisted instructional study designed to utilize right cerebral hemisphere functions in the learning and memory process. Two versions of a lesson on how a simple battery works were designed to present conceptual and topographic information either verbally or pictorially on a Plato IV…

After intensively studying for several years the thinking processes of members of a tribal group in Western Africa, the Kpelle, the authors examine the relation between culture and cognitive development. The following issues are discussed: (1) an analysis of the terms "culture" and "cognition"; (2) an ethnographic description of the Kpelle…