Approaches to Humor Appreciation; I: Personality Dispositions in Humor Preferences; 1: Humor and Anxiety; 2: Humor as a Disturbing Stimulus; 3: The Relation of Drive Discharge to the Enjoyment of Humor; 4: Some Psychological Correlates of Humor Preferences; 5: Aggression, Need for Social Approval, and Humor Preferences; 6: Repression and Insight as Related to Reaction to Cartoons; II: The Effects of Experimental Arousal on Humor Responses; 7: The Effect of Motivation Arousal on Humor Preferences; 8: The Angered: Their Susceptibility to Varieties of Humor; 9: Aggression Arousal, Hostile Humor, Catharsis; 10: Mobilization of Inhibitions and the Enjoyment of Aggressive Humor; III: Cognition and Humor; 11: Cognitive Challenge as a Factor in Children’s Humor Appreciation; 12: Distraction as a Factor in the Enjoyment of Aggressive Humor; IV: Social Aspects of Humor; 13: The Position of Humor in Human Communication; 14: Regression in Primitive Clowning