title: On the causal and functional significance of displacement activities.
mesh_terms: D000818:Animals; D001070:Appetitive Behavior; D001143:Arousal; D001522:Behavior, Animal; D004208:Displacement, Psychological; D004328:Drive; D004777:Environment; D005246:Feedback; D005639:Frustration; D006801:Humans; D009042:Motivation; D012106:Research; D009626:Terminology as Topic