Abstract
The present study examined the effects of total exposure duration and interrupted versus continuous exposure on flooding for public speaking anxiety. Total exposure durations of 100, 150, and 200 min were compared with either 50 min of continuous scene presentation or with two 25-min presentations separated by a 10-min interval. Dependent measures included behavioral, self-report and physiological indices. Continuous exposure was clearly superior to interrupted exposure. Explanation for this finding may be found in the habituation data on self-reported anxiety during treatment sessions. Continuous exposure led to a curvilinear pattern of self-reported anxiety, with anxiety first increasing then decreasing. Interrupted flooding led to increasing linear patterns of anxiety during each session. Total exposure duration of 100 min (two sessions) appeared sufficient for this population and disorder.
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