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In Experiment 1, sign- and goal-tracking behavior was measured in sign-trackers (STs) and goal-trackers (GTs) during three additional Pavlovian conditioned approach sessions: baseline, test, and post-test. During the Pavlovian conditioned approach test session, subanesthetic ketamine (Ket; 32 mg/kg) or vehicle (Veh; saline) were administered 30 min prior to testing. Data are presented as mean ± S.E.M.
