Several studies have explored the application of self-generated attitude change model to the reduction of phobic affect. Three treatment analogues of constrained thought, previously demonstrated to attenuate polarized affect, were compared to determine the relative efficacy of process constraint, reality constraint, and combined constraint. The effects of treatment were assessed with-measures of behavioral approach, physiological arousal, subjective fear report, self-appraised performance, and subject predictions of ability to cope in extra laboratory situations. It was predicted that the combined condition would provide the most powerful treatment analogue but this was not demonstrated. Subjects in all conditions improved across all measures, except physiological arousal, but not differentially. Several possible explanations, alternative theories, and remaining research issues are discussed.