The Problem Solving Inventory (PSI; Heppner & Petersen, 1982) is a widely used measure to assess one's perceived ability in problem-solving behaviors and attitudes in the United States and many other countries. In this study, a bilevel model was examined with a Mexican American high school student sample (N = 164) using confirmatory factor analysis. Results of the confirmatory factor analysis supported the bilevel model with the current sample of Mexican American high school students. The data provided support for the PSI and enhances the generalizability of some of the previous findings based on the U.S., Turkish, and South African samples. Also, this study provides crosscultural information that promotes our knowledge about the efficacy of problem-solving constructs across different age and cultural groups. The Problem Solving Inventory (PSI) (Heppner, 1988; Heppner & Petersen, 1982) has been applied to more than 120 studies in the past 20 years (Heppner, Witty, & Dixon, 2004 & Anderson, 1985; Nezu, 1985), physical health (e.g., Elliott, 1992), coping behavior (e.g., Heppner, Reeder & Larson, 1983), career planning and decision making (e.g., Larson & Heppner, 1985; Heppner & Krieshok, 1983), and study habits and academic performance (Elliot, Godshall, Shrout, & Whitty, 1990). In addition, problem-solving appraisal has been linked to a host of behavioral, affective and cognitive activities related to personal problem-solving (Heppner, 1988). These studies demonstrate the important role of the problem-solving appraisal in personal adjustment.Problem-solving appraisal is relevant for educators, psychologists, and student affairs professionals (Heppner & Baker, 1997). For example, educators are interested not only in increasing knowledge about some specific topics but also in increasing students' problem-solving abilities. Similarly, student affairs professionals are often interested in psychoeducational programming to improve specific skills (e.g., assertiveness), as well as general problem-solving skills for preventive purpose. Problem-solving is a topic that has a great deal of applicability for practitioners as they work to increase the problem-solving Validity of PSI with Mexican Americans 5 effectiveness of a broad range of people (e.g., children, adolescents, college students, adults, and older adults.)The PSI has demonstrated acceptable internal consistency across independent samples and cultural groups; however, most of the PSI research has been conducted with European American college students (Neville, Heppner, & Wang, 1997). Thus far, the cross-cultural studies of the PSI have included African American college students