The conclusion that learning disabled children have a deficit in perceptual organization is not accepted because of two major methodological problems. Dean refutes this criticism showing that learning disabled children have a perceptual organization deficit when compared with emotionally disturbed children. (Author/BEF)

Six articles are presented on the use of human subjects in research on acquired immune deficiency syndrome (AIDS). Topics include the ethics of human experimentation, female and pediatric AIDS patients, Human Immunodeficiency Virus (HIV) infection and AIDS among correctional inmates, community-based AIDS research, and clinical trials of HIV…

Gotlib and Asarnow suggest that learned helplessness may not adequately model clinical depression. They reply to Rohsenow's criticism that Gotlib and Asarnow's conclusions are unwarranted because the null hypothesis is not demonstrated by a single study and because adequate diagnostic criteria are not presented. (Author/BEF)

Ten articles on the use of multilevel data in educational research are presented. Topics include model specification and building, analytical procedures, aggregation bias, least squares statistics, hierarchical linear models, significance testing, and testing multilevel product-process networks. (TJH)