On each trial in an experiment, participants view a rapid sequence of letters presented at the center of a screen. For each sequence they must determine whether an “X” appeared in the sequence, and also whether an “S” appeared. Participants’ detection of the “S” should be ______ if it follows the “X” by ______ ms or less.
enhanced; 500
enhanced; 1000
impaired; 500
impaired; 1000
