This study describes the events and people involved in one particular case of crowd hysteria occurring in a group of limited age range and environmental exposure and investigages differences between the hysterical group and controls on sociologic, psychologic, demographic, health, and school history variables. (Author)

Head Start children were matched into two groups on the basis of disruptive behavior during rest periods. Attempts were made to modify their behavior using either instructions or token reinforcement procedures. Results suggest that a combination of reinforcement together with instructions is much more effective than either of these alone. (Author)

Testing the hypothesis that group-centered leadership leads to less problem behavior among emotionally disturbed adolescents, 20 male and female adolescents aged 14-18 (from Karitas Community in Crystal Springs, Mississippi) were divided into leader-centered and group-centered groups and exposed to 3 weekend camping experiences. Assessments were…