title: [Gratifications versus frustrations].
authors: Georges
authors: G
authors: Abraham
mesh_terms: D005639:Frustration; D006801:Humans; D009042:Motivation / Q000502:physiology; D010146:Pain / Q000523:psychology; D010553:Personality Development; D057181:Pleasure / Q000502:physiology; D010990:Pleasure-Pain Principle