Aftereffects Associated with One or Two Stressors Across Conditions of Complete , Partial , or No Control CD CD Captain

^V^ Abstract o M £■% This study examined human aftereffects (i.e. , f* psychological, behavioral, and physiological) associated with ■■" one or two Stressors (i.e., noise, noise and/or a strobe light) ■ over three levels of control (i.e., no, partial, or complete) ^J where control could be repeatedly exerted to terminate the < Stressor(s). The new concept of partial control, rather than complete or no control, is more analogous to the many daily interactions humans face. Greater psychological, behavioral, and physiological aftereffects were associated with two Stressors or the uncontrollable conditions; partial or complete control conditions were analogous to the comparison (no stressor/no control) group. Urinary catecholamines (i.e., epinephrine and norepinephrine) paralleled these findings showing greater arousal when control was absent than when control was available. Men had significantly greater catecholamine levels than did women.