Fig. 2

Trial design. For the whole trial and during each block, a fix square was displayed. In each trial, images were presented in the square for either 23.5 or 82.3 ms. Participants could respond until 1500 ms after stimulus offset to a two-option forced choice (“yes”/”no”), answering the question “Did you see an animal image?” Participants were asked to respond as accurately and as fast as possible