A 1969 study by Zajonc ("ZYE-unz") et al. used the speeds of various cockroaches to argue that this state resulted in a "social facilitation effect.
In a 1974 experiment conducted by Zanna and Cooper, misattribution of this state to a placebo resulted in less attitudinal change in participants who were given the choice whether to write an essay arguing against their own beliefs. A 1969 study by Zajonc ("ZYE-unz") et al. used the speeds of various cockroaches to argue that this state resulted in a "social facilitation effect." It's not "flow," but in a model created by MihalyCsÃ­kszentmihÃ¡lyi (" CHEEK-sent-me-hy-ee "), this state results when a person of middling skill level attempts a high-difficulty task. Being in this state led more male participants to call a (*) female experimenter standing on the middle of a bridge, in an experiment conducted by Dutton and Aron. That experiment lent evidence to a theory of emotion which pairs this state with appraisal, and which was developed by Schachter and Singer. An early theory about this state claimed that it has an inverted U-shape relationship with performance, and was developed by Yerkes and Dodson. For 10 points, name this state activated by the autonomic nervous system, which generally corresponds with alertness. 
In a 1974 experiment conducted by Zanna and Cooper, misattribution of this state to a placebo resulted in less attitudinal change in participants who were given the choice whether to write an essay arguing against their own beliefs.
arousal [or being aroused, prompt on "alertness"] 