Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 43 1 2005 02 15 43 49 H. Kaviani A. S. Mousavi 2015 09 28 It has been reported previously that modulatory effects of pleasant and unpleasant slides on the human acoustic reflex are observed only if startle probes are presented to the left ear or with binaural presentation. The present study examined the effects of the left and the right ear stimulation on modulated startle reflex (as indexed by eyeblink component, measured at the right eye) employing short (2-min) film-clips to elicit emotions. Sixteen right-handed subjects served as volunteers. The experiment included two consecutive sessions, on a single occasion. The acoustic stimuli were presented monaurally to one of the ears in each session, counterbalanced across order. The laterality phenomenon in startle modulation previously observed with affect-toned slides was not confirmed in this experiment. The probable discrepancy will be discussed methodologically. https://acta.tums.ac.ir/index.php/acta/article/view/2960 https://acta.tums.ac.ir/index.php/acta/article/download/2960/2941