Figure 3.

a, Mean responses to different stimulus conditions and attentional tasks. We found no significant univariate differences between conditions. b, Classification performance for AO versus AC using chromatic and achromatic gratings. Performance was highly significant for the chromatic condition but nonsignificant for the achromatic gratings. Overall performance for classifying chromatic versus achromatic gratings in V1 is also well above chance. Error bars are 1 SEM. Symbols are individual subject data.