Background: Recent surveys estimated that prevalence rates of
obsessive-compulsive disorder were (OCD) more than those
estimated by earlier surveys. Moreover, in the general non-clinical
population, many studies found high incidence of obsessions and
compulsions (OC).
Objective: To develop and validate a revised version of the Arabic Scale of Obsession-Compulsion (ASOC) as a trait scale, suitable
for research studies.
Methods: A Sample of 150 non-clinical undergraduates was
recruited. The latest version of the revised ASOC is comprised of
20 short statements, plus five filler items. Three subscales of OC were
used as criteria from the MMPI, and the Symptom Checklist,
(SCL), as well as the Obsessive-Compulsive Inventory (OCI).
Results: Cronbach alpha reliabilities reached .882 (men), .910
(women), and .897 (total group). The correlation coefficients of
the ASOC with the MMPI, SCL, and OCI scales were .759, .783, and .885,
respectively. A principal component analysis retained one
high–loaded factor labeled “Obsession-compulsion:. The loading of the
ASOC onto this factor was .948, indicating very high factorial
validity.
Conclusion: The ASOC has good psychometric characteristics, i.e., high internal consistency and concurrent and factorial
validities.
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