“…As expected, they found that subjects who received false heart rate feedback, indicating that physiologically they did not react fearfully to the phobic stimuli, subsequently showed more snakeapproach behavior than control subjects. Consistent with this finding, numerous investigators have found that false physiological feedback (e.g., heart rate, electrodermal activity) is effective in modifjing subjective perceptions of fear and anxiety (e.g., Holmes & Frost, 1976;Lick, 1975), attractiveness (e.g., Hirschman, Clark, & Hawk, 1977;Kerber & Coles, 1978), unpleasanmess (Young, Hirschman, & Clark, 1982), persuasion (Hendrick, Giesen, & Borden, 1975), Me stress (Stem, Miller, Ewy, & Grant, 1980), and depression (Stern, Berrenberg, Winn, & Dubois, 1978). These results have been used to challenge the Schachter and Singer theory of emotion because subjective change occurred in the absence of actual physiological change.…”