THE EFFECTS OF INTERSPERSAL TRAINING VERSUS HIGH‐DENSITY REINFORCEMENT ON SPELLING ACQUISITION AND RETENTION

Abstract

This study investigated the effects of interspersing known items during spelling instruction on new words for three mentally retarded students. Following a baseline consisting of the presentation of 10 test words per session, a multielement design was implemented. During interspersal training sessions, previously mastered words were presented alternately with each of 10 test words. During high-density reinforcement sessions, 10 test words were presented and additional reinforcement was provided for task-related behaviors. Throughout all conditions, test words were deleted and replaced after meeting a mastery criterion. Periodic retention tests were administered over mastered words and a cumulative retention test was administered at the end of the experiment. Results showed that high-density reinforcement did facilitate performance over baseline; however, intersperal training was superior to the other conditions in terms of both acquisition rate and short- and long-term retention. In addition, students preferred the interspersal condition when offered a choice.

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