The Changes in Sexual Functioning Questionnaire (CSFQ) is a 36-item clinical and research instrument identifying five scales of sexual functioning. This study documents the internal consistency and factor structure of a 14-item version of the CSFQ (CSFQ-14), which yields scores for three scales corresponding to the phases of the sexual response cycle (i.e., desire, arousal, and orgasm) as well as the five scales of the original CSFQ. Factor analysis confirms the construct validity of the CSFQ-14 as a global measure of sexual dysfunction. The CSFQ-14 and the individual scales exhibit strong internal reliability.