Figure 1. Texture discrimination with varying temporal structures.

Participants performed the texture discrimination task, in which a target frame is followed by a patterned mask, limiting processing time (stimulus onset asynchrony, SOA). The task requires to discriminate whether an array of 3 diagonal bars embedded in a background of horizontal bars, was horizontal or vertical. Following an initial threshold measurement, the temporal structure was varied, before the final Day 1 threshold measurement. On Day 2 all subjects performed an identical threshold measurement (see methods).