Before revision: In one type of test, participants are asked to pay attention to one or both of the stimuli; later, they are asked about the content of either the stimulus they were asked to attend to or the stimulus that they were not told to ignore.
After revision: In one type of test, participants are instructed to pay attention to one or both of the stimuli; later, they are asked about the content of either the stimulus they were asked to attend to or the stimulus they were instructed to ignore.