This study examined whether exposure to second/foreign language (L2) data under different computerized task conditions had a differential impact on learners' ability to recognize and produce the target structure immediately after exposure to the input and over time. Learners' L2 development was assessed through recognition and controlled-production tests containing old and new exemplars of the target structure. Adult learners of Spanish were exposed to past conditional sentences under 1 of 6 conditions premised on different degrees of explicitness. The degree of explicitness was manipulated by combining 3 features: (a) a pretask providing explicit grammatical information, (b) feedback concurrent to input processing, and (c) variation in the nature (i.e., implicit or explicit) of the feedback in those cases in which it was provided. The advantages of processing input under explicit conditions were evident (a) in production more than in recognition and (b) in new exemplars more than in old exemplars.