Effort, objective self-awareness, choice, and dissonance.
D000339:Affect; D001290:Attitude; D003071:Cognition; D003073:Cognitive Dissonance; D003657:Decision Making; D005260:Female; D006801:Humans; D008297:Male; D009040:Motion Pictures; D005082:Physical Exertion; D012054:Reinforcement, Psychology; D012649:Self Concept; D012737:Sex Factors; D013637:Tape Recording