title: Frustration and task complexity: an extension of frustration theory.
mesh_terms: D003216:Conditioning, Operant; D005639:Frustration; D006801:Humans; D007858:Learning; D009042:Motivation; D010551:Personality; D011336:Probability; D011582:Psychological Theory; D011930:Reaction Time; D012201:Reward; D013647:Task Performance and Analysis; D014796:Visual Perception