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  • Title: IAPS includes photographs that elicit low-arousal physiological responses in healthy volunteers.
    Author: Ribeiro RL, Teixeira-Silva F, Pompéia S, Bueno OF.
    Journal: Physiol Behav; 2007 Aug 15; 91(5):671-5. PubMed ID: 17482220.
    Abstract:
    This article describes pleasant IAPS pictures that elicit low-arousal rather than the high-arousal physiological responses previously reported in the literature. Thirty-two International Affective Picture System (IAPS) photographs were grouped into 4 sets of 8 photographs: highly pleasant-arousing (sexual content and adventures), highly pleasant-relaxing pictures (landscapes, flowers or babies), neutral on both valence/arousal, and highly unpleasant-arousing ones. These stimuli were shown to 24 healthy Brazilian University students (12 males) who had their physiological responses recorded [corrugator and zygomatic facial electromyography activity, skin conductance, heart rate, and peripheral temperature]. Zygomatic EMG differentiated low-arousal pleasant photographs from high-arousal pleasant stimuli of the same valence.
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