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Caitlin Mullin, Krista Kelly, Jennifer Steeves; Fear Factor: Attention capture by fearfully expressive faces in an RSVP task. Journal of Vision 2009;9(8):117. doi: 10.1167/9.8.117.
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© ARVO (1962-2015); The Authors (2016-present)
When participants search rapid serial visual presentation (RSVP) streams for a single target, accuracy is high, given that distractors in RSVP do not usually deplete the attentional resources required to perform the target search. Attentional blink (AB) occurs when RSVP streams include two targets. Accuracy for identification of the first target (T1) is typically high, but accuracy for the second target (T2) is impaired if it is presented less than 500 ms after the first target (Raymond, Shapiro, & Arnell, 1992). However, researchers have demonstrated that a task-irrelevant RSVP distractor can act as an involuntary T1 and result in an AB provided that it adequately matches the target search template or is visually novel. Task-irrelevant T1 arousing words capture attention and enter awareness at the expense of T2 targets (Arnell, Killman, Fijavs, 2007). In the present experiment, participants performed single target T2 search for recognition of an intact scene imbedded among 16 scrambled scenes and faces. The task-irrelevant T1 distractor image of an intact face varied in emotional expression (happy, fear or neutral) and appeared 270ms (within the AB window) or 630ms (outside the AB window) before the T2 target scene onset. We also included a control condition with no T1 distractor. RSVP stream images were presented for 90 ms each. Participants performed a 4-AFC scene matching task following the RSVP stream. Preliminary results indicate significantly poorer accuracy for identification of scenes preceded by a task-irrelevant T1 face image presented at 270 ms compared to 630 ms but only for fearful emotional expressions. The emotional expression, happy, did not cause AB. This suggests that fearful emotional expressions capture attention and enter awareness at the expense of goal-driven targets, signifying preferential attentional processing perhaps as an evolutionary self preservation mechanism.
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