The effects of formal and acoustic repetition in the Brown-Peterson paradigm.

On a given trial in the Peterson and Peterson paradigm, the trigram B, K, T was presented. For one group this same trigram had been presented three trials earlier (exact repetition). For another group the critical item which had preceded the consonant trigram was BEE, KAY, TEA (homophonic repetition). Both groups showed a repetition facilitation significant beyond that of the appropriate control groups. The exact repetition group excelled the homophonic repetition group. Postexperimental questionnaires on awareness of the experimental manipulation did not precisely clarify the results obtained. The data support the view of multiple encoding.