Uher, Heyman, Turner and Shafran (2008) evaluated the test with a clinical sample of 285 children and adolescents with OCD. The ChOCI-R has acceptable internal consistency, and the ChOCI-R impairment scales show convergent validity with the similarly-structured CY-BOCS. The measure also demonstrates divergent validity with a measure of general child psychopathology. The self-report version of the ChOCI-R yielded clearer distinctions between obsessions and compulsions than the parent-report version.
A raw score for each compulsion and obsession subscale is provided in the output, along with raw scores for total impairment (range 0-48) and total symptoms (range 0-40). Each subscale and total score are also presented as percentiles based on responses from a sample of young people referred to an OCD clinic (Uher et al., 2008). A percentile of 50 indicates the average reported score for a young person with OCD.
Higher total impairment scores indicate higher levels of severity/distress related to OCD symptoms, whilst higher total symptoms scores indicate greater complexity and pervasiveness of OCD symptoms.
Each subscale is computed as follows:
– Compulsion Symptom score: Sum of questions 1 to 10
– Compulsions Impairment score: Sum of questions 14 to 19
– Obsession Symptom score: Sum of questions 20 to 29
– Obsession Impairment score: Sum of questions 33 to 38
– Total symptom score: compulsion symptom score + obsession symptom score
– Total impairment score: compulsions severity score + obsession severity score
Uher, R., Heyman, I., Turner, C. M., & Shafran, R. (2008). Self-parent-report and interview measures of obsessive–compulsive disorder in children and adolescents. Journal of Anxiety Disorders, 22(6), 979-990. doi:10.1016/j.janxdis.2007.10.001