Two experiments are reported that examine the effects of repetition on name retrieval in younger adults (in their 50s and 60s) and older adults (in their 70s and 80s). In Experiment 1,the subjects were asked to name a set of famous faces four times over the course of a L-h session. Younger subjects produced significantly more correct responses than did older subjects. There was significant improvement with repeated attempts at naming, with younger and older subjects benefiting equally in terms of increasing numbers of correct responses across the session. In contrast, there was a highly significant age deficit in picture recognition over a similar retention interval. A qualitative analysis of naming responses (full name vs. part of the name) provided support for the view that aging and nonrecent use have equivalent effects on retrieval. In Experiment 2, younger subjects (but not older subjects) were significantly more likely to correctly name famous faces that they had seen 22 months previously than to correctly name new famous faces. In contrast, older subjects (but not younger subjects) were significantly more likely to produce erroneous names to famous faces that they had seen 22 months previously than to new famous faces. It is concluded that repetition priming may be relatively unaffected by aging over short retention intervals (Experiment 1) but not over a very long retention interval (Experiment 2).Memory tasks such as free recall and recognition are examples of explicit memory; that is, performance on the task requires conscious recollection of a previous experience. In contrast, implicit memory is revealed when performance on a task is influenced by a previous experience but in the absence of conscious or intentional recollection of that experience (Graf & Schacter, 1985). Recent evidence on implicit memory comes largely from studies ofrepetition priming, which refers to the facilitation in the processing ofa stimulus (either improved accuracy or reduced latency) as a function ofa recent encounter with the same stimulus (see Schacter, 1987, for a review).Implicit memory can be dissociated from explicit memory in a number ofways. First, performance on implicit and explicit memory tasks is affected differentially by various experimental manipulations. One such factor that is relevant to the present study is retention interval. For exThis research was reported at a meeting of the Experimental Psychology Society, Cambridge, England, April 1995. This article was written while the author was employed at the Medical Research Council's Applied Psychology Unit, Cambridge, UK. I am grateful to Patrick Rabbitt for access to volunteers at North East Age Research (University of Newcastle-upon-Tyne) and to Catherine Brennard, Joyce Hunter, Lynn Mcinnes, and Louise Turner for their assistance in the recruiting and testing of subjects, I also thank Andy Calder for some of the stimuli used in Experiment 2 and Hilary Green for assistance with data analysis. David Mitchell and an anonymous reviewer provided helpful commen...