On the cogency of the ppi-pi effect.
The present paper discusses briefly the incompatibility between the propositions that (1) the preceding preparatory interval moderates the reaction time of the subsequent trial, and (2) and inability to maintain task-relevant vigilance is the cause of the schizophrenic's peculiar response patterns in reaction time experiments.
D001288:Attention; D006801:Humans; D011930:Reaction Time; D012565:Schizophrenic Psychology