Anxiety and deficient inhibition of threat distractors: spatial attention span and time course

Abstract

We investigated whether anxiety facilitates detection of threat stimuli outside the focus of overt attention, and the time course of the interference produced by threat distractors. Threat or neutral word distractors were presented in attended (foveal) and unattended (parafoveal) locations followed by an unrelated probe word at 300 ms (Experiments 1 and 2) or 1000 ms (Experiment 2) stimulus-onset asynchrony (SOA) in a lexical decision task. Results showed: (1) no effects of trait anxiety on selective saccades to the parafoveal threat distractors; (2) interference with probe processing (i.e., slowed lexical decision times) following a foveal threat distractor at 300 ms SOA for all participants, regardless of anxiety, but only for high-anxiety participants at 1000 ms SOA; and (3) no interference effects of parafoveal threat distractors. These findings suggest that anxiety does not enhance preattentive semantic processing of threat words. Rather, anxiety leads to delays in the inhibitory control of attended task-irrelevant threat stimuli. © 2012 Copyright Psychology Press Ltd.