This study investigated individual differences in older adults' everyday problem-solving performance using 3 instruments. Past research, typically using only single measures, has yielded a multitude of findings regarding age effects in everyday problem solving. The present sample consisted of 111 older adults (44 men, 67 women) who ranged in age from 68 to 94 years. Confirmatory factor analyses revealed that, within each of the 3 instruments, subscales representing particular content domains could be reliably identified. There was, however, little relation between the different instruments, and the measures also differed in their relation with chronological age. These results support the view that everyday problem-solving competence is a multidimensional construct, of which previous investigations may only have studied particular dimensions.The goal of this study was to investigate how older adults' performance on everyday problem-solving tasks varies across methods of assessment. An increasing number of studies have focused on older adults' functioning on cognitive tasks of daily living (Hess, 1990;Poon, Rubin, & Wilson, 1989;Rogoff & Lave, 1984;Sinnott, 1989;Sinnott & Cavanaugh, 1991; Sternberg & Wagner, 1986), but most studies have considered performance only in delimited task domains, using single measures of performance. In addition, there has been little theoretical or empirical integration across studies of adult everyday problem solving. Several reasons exist for this. First, as a clearly identifiable subfield of inquiry, research into the everyday cognition of older adults is relatively new (Woodruff-Pak, 1989). Second, little consensus has been reached on what the defining task properties of everyday cognition might be and what the best methods for assessing these properties are. Indeed, even a standard nomenclature for distinguishing everyday cognition from other kinds of cognition does not yet exist; terms such as practical problem solving (Denney, 1989), everyday problem solving (Cornelius & Caspi, 1987), everyday cognition (Poon et al., 1989), pragmatics of intelligence (P. B. Baltes, 1987), and practical intelligence (Sternberg & Wagner, 1986), among others, have all been used. This diversity of labels, not surprisingly, reflects the even larger diversity of approaches that have evolved for the measurement of these constructs.Copyright 1995 by the American Psychological Association, Inc.Correspondence concerning this article should be addressed Sherry L. Willis, Department of Human Development and Family Studies, S-110 Henderson Building, Pennsylvania State University, University Park, Pennsylvania 16802, or Michael Marsiske, Max Planck Institute for Human Development and Education, Lentzeallee 94, 14195 Berlin, Germany. After July 31, 1995, Michael Marsiske's address will be the Institute for Gerontology, Wayne State University, 87 East Ferry Street, 226 Knapp Building, Detroit, Michigan 48202. Electronic mail should be sent via Internet to slw@psuvm.psu.edu or to marsiske@geroserver.iog...