Fig. 1.

Schematic representation of the behavioural paradigm. Within a block of trials subjects were instructed to fixate on the centre of the screen and were subsequently presented, in random order, with a series of different face and car images at one of six phase coherence levels. Each image was presented for 30 ms, followed by an inter-stimulus interval lasting between 1500 and 2000 ms, during which subjects were required to discriminate among the two types of images and respond by pressing a button. A block of trials was completed once all face and car images at all six phase coherence levels have been presented.