Additional report about the validity of the Jung Psychological Types Scale

The Jung Psychological Types Scale (JPTS) is the most recently developed instrument for the measurement of Jung’s psychological types. The JPTS conforms closely to Jung’s orthogonal, three-dimensional model of psychological types: extraversion-introversion, thinking-feeling, and sensation-intuition. The JPTS uses 7-point Likert-scale items in a bipolar format. The appropriateness of item content was based on the judgments of two Jungian analysts. This study provides an additional assessment of the validity of the JPTS using data from Japanese university students. To investigate the concurrent validity of the JPTS, scores were compared with scores on the Gray-Wheelwrights Test/Jungian Type Survey (GW/JTS) and the Myers-Briggs Type Indicator (MBTI), using a categorical approach. Some data were obtained by using MBTI Form M scores from previous studies (Sato, 2003, 2005). Evidence for the concurrent validity of JPTS scores is presented based on the agreement of psychological types with the MBTI Form M. These findings suggest that the categorical approach provides additional support for the validity of the JPTS.