Mean response times in milliseconds (adjusted for corresponding baseline) in the two-session condition. Results are presented across experimental ongoing task blocks in participants who made a prospective memory response on the first target cue (for the specified ongoing task; PM-Hit Subgroup) relative to those who did not (PM-Miss Subgroup) and control group participants. Response times are separated between the first 50 trials of the block, the 50 trials preceding the first target cue, and the 50 trials that followed the first target cue and preceded the second target cue. Error bars represent standard errors and asterisks indicate the significance of the group main effect for the given tertile (* indicates that p < .05, ** indicates that p < .01, *** indicates that p < .001, and all other unmarked contrasts were nonsignificant). Similar, but less pronounced patterns are observed after excluding the three trials following prospective memory responses (Section 5.4).