Parcel and Meyer's test of CHLC with second-sixth grade students revealed that most of the 20 items loaded on three factors: Internal (Self) Control, Chance, and Powerful Others.
Recently, utility of CHLC and the stability of its factor structure were tested by Hearne and Klockars.
This measure, based on an adult health locus of control scale, was adapted for use with a younger population and included some items patterned on CHLC.
This study investigated the psychometric properties of CHLC over time, when administered to large groups of children and early adolescents.
Overall CHLC scores and subscale scores were based on the frequency of "yes" responses given by each student.
Increases in overall CHLC scores as a function of grade were seen within each of the first three years of the study.
Results comparing four years of CHLC scores provide evidence suggesting that, counter to the conclusions of Hearne and Klockars, CHLC was a consistent and stable measure when administered to a population ranging from fourth-ninth grade.
The yearly factor analyses, especially their stability, contribute to both the reliability and validity of CHLC.
5,6] The positive relationship shown here between internal beliefs and age appears to be similar for both CHLC and MHLC.
This result provides another example of CHLC and MHLC behaving similarly.