Reports on a movement conducted by social workers to decrease the infection of the Acquired Immune Deficiency Syndrome by changing human behavior through public education. Stresses that the focus is to draw attention to behavior modification. (RT)

Describes recent research findings in the area of neurobiology and its relationship to learning and memory. The article provides definitions of associative and nonassociative learning, identifies essential memory trace circuits of the mammalian brain, and discusses some neural mechanisms of learning. (TW)

Described is an ongoing study of monozygotic and dizygotic twins, separated in infancy and reared apart. Discussed are the procedures and results of this study with interpretations of the results. The effects of parenting, education, and other interventions are considered. (CW)

Provides an overview of basic and applied studies for which primates are appropriate subjects. Summarizes the advantages, limitations, and constraints of using nonhuman primates in research. (RT)

Discusses the complicated infection of human immunodeficiency virus type 1 (HIV-1) in its late stages of the acquired immune deficiency syndrome (AIDS) dementia complex. Explains the syndrome's development of abnormalities in cognition, motor performance, and behavior. (TW)