A Children's Health Locus of Control Scale (CHLOCS), consisting of 20 items with three subscales (powerful others, internal control, chance control) was developed previously by Parcel and Myer to facilitate measurement of the Internal-External Construct relative to children's health behavior. The present study used two samples of children in grades K-6, also categorized by sex and socioeconomic status, to develop and evaluate a shortened nine-item version of the CHLOCS. The nine-item version proved to be reliable and to have findings consistent with previous validation studies. A version using pictures was more reliable for grade K children and may prove more reliable in grades 1 and 2 as well. (Author/RH)