Figure 2.
Response time (RT) distributions modeled according to Gaussian probability density functions for congruent (upper panel) and incongruent (lower panel) advance targets in the long S1–S2 delay condition. The two thick curves depict the overall RT distributions comprising each single trial from each subject. The thin curves represent the RT distributions separately for each subject. According to the bi-modal RT distribution for congruent targets, subjects fall into one out of two categories. ‘High readiness’ (i.e., well prepared) subjects are characterized by excessively short RTs whereas ‘low readiness’ (i.e., less well prepared) subjects consistently exhibit much longer RTs.