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  • 1.
    Flykt, Anders
    University of Gävle, Department of Education and Psychology, Ämnesavdelningen för psykologi.
    Visual search with biological threat stimuli: Accuracy, reaction times, and heart rate changes2005In: Emotion, ISSN 1528-3542, E-ISSN 1931-1516, Vol. 5, no 3, p. 349-353Article in journal (Refereed)
    Abstract [en]

    Twenty-four participants were given a visual search task of deciding whether all the pictures in 3 x 3 search arrays contained a target picture from a deviant category, and heart rate was measured. The categories were snakes, spiders, flowers, and mushrooms. Shorter reaction times (RTs) were observed for fear-relevant (snake and spider) targets rather than for fear-irrelevant/neutral (flower and mushroom)targets. This difference was most pronounced for the participants presented with a gray-scale version of the search arrays. The 1st interbeat interval (IBI), after the search array onset, showed an effect of the target, whereas the 2nd IBI also showed an effect of the distractors. The results suggest that controlled processing of the task operates together with automatic processing.

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