This study examined differences between students who have perceived themselves as "successful" and "unsuccessful" problem solvers. Specifically, differences were examined across a range of cognitive, affective, and behavioral variables, with two different types of problems-intrapersonal and interpersonal. Twenty undergraduate students who scored high and 20 who scored low on an independently developed Problem Solving Inventory (a) were questioned about how they solved interpersonal and intrapersonal problems within a 1-hour structured interview, and (b) completed the Mooney Problem Checklist. Following the session, interviewers rated each subject on several cognitive and behavioral variables, and they recorded behavioral observations and anecdotal events. The results revealed that the self-perceived "successful" and "unsuccessful" problem solvers differed (a) in the number of problems they acknowledged on the Mooney; (b) on a number of self-report ratings about the personal problem solving process (e.g., attributions, expectations, intervention strategies, attitudes, and behaviors); and (c) on ratings made by the interviewers on several cognitive and behavioral variables. In addition, results indicated that the type of personal problem being solved affected the problem-solving process.Applied real-life problem solving is of special concern for professionals who are interested in helping others solve problems that are particularly troublesome. Counselors are a group of such professionals who are interested in problem solving. Krumboltz (1965) indicates that "the central reason for the existence of counseling is based on the fact that people have problems that they are unable to resolve by themselves" (p. 383). Yet, after reviewing much of the problem-solving literature, Horan (1979) concluded that investigators have not developed a technology for helping clients with