Mean distance traveled (±SEM) of saline- and amphetamine-treated rats tested on postnatal day (PD) 24 (i.e., four days after conclusion of the drug pretreatment regimen). Rats had been pretreated with vehicle, 10 mg/kg aripiprazole, or 1 mg/kg haloperidol on PD 10–20. The testing session lasted 120 min (divided into six 20-min time blocks).
* Significant difference between the vehicle and haloperidol group on the same time block.
† Significant difference between the vehicle and aripiprazole group on the same time block.
‡ Significantly different from the vehicle group when collapsed across time blocks 1–6.