The reliability of the Family-of-Origin Scale for adolescents

The Family-of-Origin Scale (FOS), a 40-item, ten-subscale measure of family processes, exhibits promise for assessing adolescents' perceptions of family health. While initial research has suggested that the instrument demonstrates factorial validity, the reliability of the FOS for adolescents has not been established. The present study involved administering the FOS to 88 adolescents on two occasions, with a two-week interval between testings. The global FOS index and ten subscale scores demonstrated high test-retest reliability. Internal consistency reliability for the instrument was also high. When taken together with previous research, the current study's results suggest that the FOS for adolescents is psychometrically sound.