Abstract

To test certain predictions from the Ellis (1963) “stimulus trace” theory, retarded children and equal-MA normals were compared for the short-term retention of digits where length of retention interval (LRI) and amount of retroactive interference (RI) were varied. A Low-IQ deficit as well as an RI effect was demonstrated. There were no reliable IQ by LRI or IQ by RI interactions. Implications for the Ellis theory were discussed.

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