This study developed the “Humor Coping with Interpersonal Stress Scale” (HCISS) for use with Japanese university students. Study 1 (n=987) examined the factor structure and internal consistency of this scale. Results showed that the 12 items in the HCISS conform to a one-factor structure, with adequate factorial validity as well as high internal consistency. Study 2 tested the reliability and construct validity. Test-retest reliability (n=370) revealed satisfactory stability of the HCISS over a 5- to 6-week period. Construct validity was demonstrated in comparison with peer ratings (n=96) and with the Rochester Interaction Record (n=37). The HCISS is a satisfactorily reliable and valid instrument for research with adolescents and young adults.
