Exploring interpersonal judgements between pedestrians

Interpersonal judgements have been explored in three studies reported here. The first investigated the visual information extracted about other pedestrians at a range of interpersonal distances. The second study examined judgements of threat intent based on facial expressions and body postures and found that only a few expression s/postures we re judged repeatedly to present, or not present, a threat – t he level of consistency is low. The third experiment sought forced choice judgements of emotion or gaze direction after 1000 ms exposure with 18 combinations of lamp, luminance and i nterpersonal distance. R esults for judgements of emotion from facial expression suggest a minimum luminance on the face of 0.1 - 1 .0 cd/m 2 if facial expressions are to be recognised at 4 m, but above 1.0 cd/m 2 for identification at 10m.