There is a great deal of interest in characterizing the representations and processes that support visual word priming and written word identification more generally. On one view, these phenomena are supported by abstract orthographic representations that map together visually dissimilar exemplars of letters and words (e.g., the letters Ala map onto a common abstract letter code a*), On a second view, orthographic codes consist in a collection of episodic representations of words that interact in such a way that it sometimes looks as if there are abstract codes. Tenpenny (1995) contrasted these general approaches and concluded by endorsing the episodic account, arguing that no evidence demands that we posit abstract orthographic representations. This review reconsiders the evidence and argues that a variety of priming and nonpriming research strongly supports the conclusion that abstract orthographic codes exist and support priming and word identification. On this account, episodic representations are represented separately from abstract orthographic knowledge and contribute minimally to these functions.There is a great deal of interest in characterizing the representations and processes that support the improved processing of stimuli repeated during an experiment-the repetition priming effect. Indeed, two different types of repetition priming have been intensively studied from two quite different perspectives. On the one hand, researchers interested in memory have tended to focus on long-term repetition priming, in which facilitation can last minutes, hours, and sometimes longer (Sloman, Hayman, Ohta, Law, & Tulving, 1988). For example, participants are generally faster and more accurate in making lexical decisions to test words encoded a few minutes or hours previously in a study list (see, e.g., Scarborough, Cortese, & Scarborough, 1977). On the other hand, researchers interested in language processing have tended to focus on short-term repetition priming in order to address questions regarding how single words are identified. In a typical short-term priming task, a pattern mask (e.g., ######) is replaced by a prime word that is briefly flashed (e.g., 50 msec), which in turn is replaced by the target. Under these conditions, primes are typically unnoticed by the participants, but these items nevertheless facilitate processing of targets when the prime and target are the same. One key attribute of masked priming is that it lasts only a few seconds (e.g., Forster & Davis, 1984).Among memory researchers, interest in long-term repetition priming was inspired by the observation that densely amnesic patients show robust (sometimes normal) priming despite poor (sometimes chance) performance I thank Chad Marsolek, Michael Masson, Kate Nation, and Keith Rayner for valuable suggestions that greatly improved this paper. Correspondence should be addressed to 1. S. Bowers, Department of Experimental Psychology, University of Bristol, 8 Woodland Road, Bristol SS8 lIN, England (e-mail: j.bowers@bris.ac.uk).
83on explicit re...