Table 1. An outline of the experimental design.
In-phase dot training | Counter-phase dot training (total n = 11; n = 6 completed both protocols) | ||
Protocol 1 (n = 7) | Protocol 1 (n = 9) | Protocol 2 (n = 8) | |
Pre-training scan: stimuli | In-phase dots only | In-phase & counter-phase dots | In-phase & counter-phase dots |
Pre-training scan: task difficulty | Same angle only | Same angle only | Same angle only |
Post-training scan: stimuli | In-phase dots only | Counter-phase dots only | In-phase & counter-phase dots |
Post-training scan: task difficulty | Same and smaller angle | Same and smaller angle | Smaller angle only |
The main experiment employed protocol 1 whereby learning related changes in the response of hMT+ and V1 were compared between two groups, one trained on in-phase dots and the other trained on counter-phase dots. Protocol 2 applied only to the group trained on counter-phase dots and compared the response of hMT+ and V1 to in-phase vs. counter-phase dots pre and post training (within subjects). A total of 11 participants were trained on counter-phase dots and 6 completed both scanning protocols after training. Same angle refers to the angular difference in motion axis orientation that gave rise to 75% correct before training. Smaller angle refers to the angular difference corresponding to 75% correct after training.