Primacy and recency in the continuous distractor paradigm.

Three experiments investigated serial position effects in immediate and final free recall. Each word in a 10-item list was both preceded and followed by a 15-sec period of distraction activity. In Experiment 1, half of the lists were immediately followed by either a recall test or a recognition test; the remaining lists were not tested, but were followed by a different distraction activity. After presentation of all lists, a final recall or recognition test was given. Primacy was observed only in immediate free recall and in all final tests following immediate free recall, demonstrating that primacy develops from a free-recall storage strategy. No recency was observed in Experiment 1. In Experiment 2, every list was followed by an immediate free-recall test, with a final free-recall test after the last list. The primacy results of Experiment 1 were replicated. Furthermore, the appearance of recency in Expriment 2 suggests that recency results from a retrieval strategy that failed to develop in Experiment 1 because some lists were not tested immediately. To eliminate an artifact account, Experiment 3 used an experimenter-paced distractor task