Fig. 4.

Performance on memory tasks. A: Orientation memory performance for no concurrent integration task (grey), concurrent orientation integration task (blue) and concurrent colour integration task (red). B: Colour memory performance for no concurrent integration task (grey), concurrent orientation integration task (blue) and concurrent colour integration task (red). Error bars are 95% confidence intervals. Significant differences are indicated with an asterisk. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)