Unlearning and competition in List-1 recall.

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Abstract
RETROACTIVE INHIBITION (RI) WAS COMPARED FOR A MODIFICATION OF THE MODIFIED FREE RECALL TEST (MMFR) AND PACED RECALL IMMEDIATELY AFTER LEARNING AND 4 DAYS LATER. UNLEARNING WAS INFERRED FROM RI IN MMFR. COMPETITION WAS INFERRED IF RI WAS GREATER IN PACED RECALL THAN IN MMFR. INTERFERENCE WAS PRODUCED BY LEARNING A SINGLE LIST (I-1) OR 4 LISTS (I-4) AFTER LEARNING LIST 1. UNLEARNING WAS GREATER FOR I-4 THAN FOR I-1, AND DECLINED OVER 4 DAYS. COMPETITION WAS NOT OBSERVED. THE DIFFERENCE BETWEEN MMFR AND PACED RECALL IN CONTROL (C) GROUPS RESULTED FROM RECALL IN MMFR OF WEAK ITEMS WHICH WERE NOT RECALLED BY I SS, BIASING THE MEASURE OF COMPETITION. WHEN RECALL DIFFERENCES IN I AND C GROUPS WERE CONTROLLED, COMPETITION WAS OBSERVED. CONTRARY TO PREDICTIONS BASED ON LIST DIFFERENTIATION, COMPETITION WAS OBSERVED IN THE IMMEDIATE RECALL TEST, AND DID NOT INCREASE OVER TIME. COMPETITION WAS EQUAL IN I-1 AND I-4. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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