Emotional gist: the rapid perception of facial expressions

While it has been established that expression perception is rapid, it is unclear whether early appraisal mechanisms invoke holistic perception. In the current study, we defined gist perception as the appraisal of a stimulus within a single glance (<125 ms). We employed the expression composite task used previously Tanaka and colleagues in a 2012 study. With several critical modifications: (i) we developed stimuli that eliminated contrast artefacts, (ii) we employed a masking technique to abolish low-level cues and (iii) all the face stimuli were composite stimuli compared to mix of natural and composite stimuli used in the 2012 study. Participants were shown a congruent (e.g. top: angry/ bottom: angry) or incongruent (e.g. top: angry/ bottom: happy) expression for 17, 50 or 250 ms and instructed to selectively attend to the cued expression depicted in the top (or bottom) half of the composite face and ignore the uncued portion. Compared to the isolated condition, a facilitation effect was found for congruent angry expressions, as well as an interference effect for incongruent happy and angry expressions at the shortest exposure duration of 17. Together these results provide evidence that for the holistic gist perception of expression that cannot be overridden by selective attention.