The Singer-Loomis Inventory of Personality (SLIP) was developed by two Jungian analysts to allow examination of personality from the perspective of Jung's typology and to solve problems perceived with the Myers-Briggs Type Indicator, based on Jungian dichotomies. The SLIP is designed to clarify and describe the user's personality based on the patterning of eight cognitive modes of psychological types. It uses a five-point Likert-type scale to determine the preferred order for eight personality components. Each individual's personal profile consists of a combination of the eight modes that make up the cognitive style. The individual also has a predominant orientation (introversion or extroversion) and four functions (thinking, feeling, sensation, and intuition). The SLIP is available for individuals of high school age and older. Fifteen situations are presented, each followed by eight items to which the user must respond. From a practical point of view, the instrument is easy to administer, to take, and to score. Evidence for reliability, content validity, construct validity, and criterion validity is reviewed. A summary evaluation suggests that the SLIP appears to be a useful tool for educators, counselors, and clinicians, and is likely to be informative to those exploring Jungian personality types. (SLD)