This laboratory-based study of second- and third-year American university students learning French examines the effectiveness of implicit and explicit corrective feedback on noun-adjective agreement errors. The treatment consisted of one hour of interactive tasks. Implicit feedback was operationalized as a single recast with interrogative intonation; explicit feedback was operationalized as a single repetition of the incorrect utterance with interrogative intonation, followed by a single recast with declarative intonation. Testing instruments were administered on three occasions. They comprised a spontaneous production test, an elicited imitation test, and an untimed written grammaticality judgement test. Results showed no significant differences for type of feedback but significant effects for oral interaction. (Contains 3 notes and 6 tables.)