In the second half of each test session, DS+ w Cocaine (coc) and Non-Contingent cocaine (NC coc) spurred drug-seeking as indicated by an increase in (A) active responses (inactive depicted by black lines) and disrupted the sustained attention task performance as indicated by an increase in (B) trial omissions and decreases in number of total (C) hits and (D) correct rejections by STs (DS+ w coc, n = 9; NC coc, n = 10) and GTs (DS+ w coc, n = 5; NC coc, n = 6). * indicates significant difference of DS+ w coc or NC Coc compared to baseline (BL). Values represent means ± SEM.