The face wins: Stronger automatic processing of affect in facial expressions than words in a modified Stroop task

Affective words and faces each seem to be evaluated automatically, but it is unclear if they differ from one another in perceptual salience as measured by automaticity. The current study examined a possible hierarchy among affective stimuli using a modified photo-word Stroop task. Positive and negative words were superimposed across faces expressing positive (happy) and negative (angry, sad) emotions. Participants categorised the valence of faces and words. Across two experiments, interference effects were seen for both stimulus types. However, larger interference effects occurred during judgements of words than expressions, suggesting affective faces are processed more automatically than affective words. When the strength of positive and negative expressions is compared, angry expressions resulted in a larger interference effect than sad, and happy expressions produce interference similar to that of angry faces. The latter result contrasts with research suggesting potential threat stimuli are processed more automatically than positive stimuli. Implications are discussed.