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Overall social activity (frequency of play, social investigation and contact) in adolescent male rats following an acute challenge with MK-801, PEAQX, or ifenprodil. Regardless of dose, MK-801 and PEAQX resulted in a significant increase in overall social activity (see inserts), whereas only the 0.75 mg/kg dose of ifenprodil increased social interactions. * indicates a significant difference between baseline and test day. p<0.05
