PERCEIVED DEGREE AND DETECTABILITY OF FACIAL HAPPINESS AND ANGRINESS: THE ROLE OF THE PARTICULAR STIMULI
The purpose of the present study was to elucidate further Pixtonâ€™s and colleagues (2007, 2008, 2009) results with a between-group study. Two groups (happy, angry) viewed pictures of facial expressions (Tottenham et al., 2009) with three presentation times (12.50, 18.75, 25.00 ms) and completed a detection (Part 1) and a rating (Part 2) task. In Part 1, participants answered â€œyesâ€ if they thought the face was happy (happy-group) or angry (angry-group) and â€œnoâ€ if not. In Part 2, they rated each face stimulus on each of three scales (angriness, happiness, emotionality). â€œNeutralâ€ faces were not rated equally neutral by either group. Taking this into account, adjusted d values were higher for the happy-face group than for the angry-face group for the two longest times. Together with Pixton and colleaguesâ€™ results, when investigating the detectability of emotions, account must be taken of the particular stimuli used, which has now been demonstrated in a between-groups and a within-participants study.