In five experiments, participants studied pairs of words and yes/no recognition memory for both item and associative information was tested. Two stimulus manipulations, nouns versus nonnouns and high versus low word concreteness, produced the mirror effect for both item and associative recognition. The mirror effect was reflected in both measures of accuracy and response latency. A word frequency manipulation, however, produced the mirror effect only for item recognition. Two additional experiments showed that the mirror effect could also be obtained between nouns and nonnouns and between high and 'low concrete words for associative recognition in a forced-choice recognition procedure. The results extend the generality of the mirror effect to measures of response latency and to associative recognition and also suggest that similar retrieval and decision processes underlie recognition of item and associative information.The mirror effect has been shown to be an important feature of item recognition (Glanzer & Adams, 1985, 1990Glanzer, Adams, & Iverson, 1991;Glanzer, Adams, Iverson, & Kim, 1993). The purpose of the present study was to compare and contrast the mirror effect for item and associative recognition memory.Item information provides the basis for remembering that a particular event has previously been experienced, whereas associative information represents relationships between items or events (Humphreys, 1976;Murdock, 1974). Tests of item recognition involve discriminations between old (studied) and new (nonstudied) events. Associative recognition requires subjects to discriminate intact or studied pairs from rearranged or new pairs (see, e.g., Clark, 1992;Hockley, 1991Hockley, , 1992Humphreys, 1976Humphreys, ,1978Murdock & Hockley, 1989). Rearranged test pairs consist of two previously studied words that have been presented in different study pairs. Thus, the discrimination of intact pairs from rearranged pairs cannot be based on the familiarity of the individual items in the test pairs but, rather, must be based on memory for the associations formed between items during the study phase.Several findings provide strong empirical support for the theoretical distinction between these two types of information in human memory. For example, processes at encoding can differentially emphasize item or associaThis work was supported by Natural Sciences and Engineering Research Council of Canada Grant OGPINOI2. Portions of this study were presented at the XXV International Congress of Psychology, Brussels, in July 1992. I thank Murray Glanzer for providing the high/low word frequency pool; Deborah Connolly, Lyla Caudle, and Carolina Cristi for data collection; and Steve Clark, Michael Humphreys, Margaret Intons-Peterson, and Doug Hintzman for helpful comments on earlier versions ofthis paper. Correspondence can be addressed to the author, Department of Psychology, Wilfrid Laurier University, Waterloo, ON, Canada N2L 3C5 (e-mail: whockley@ mach l.wlu.ca).tive information (see, e.g., Bain & Humphreys, 1988;McGee, 1...