Development and Establishment of Reliability and Validity of Obsessive-Compulsive Disorder Scale

Abstract

Obsessive Compulsive Disorder (OCD) is a chronic disorder increasing overtime, hence in need of its proper timely assessment. To achieve this objective a valid and reliable tool is needed which gives the accurate assessment of the disorder. There are some scales which already fulfills this function but they are in foreign language which may not yield sound results. For the said purpose 70 statements in Likert format were devised which were reduced to 50 after the thorough check by the expert. The remaining items were scrutinized quantitatively by applying it on a sample of 300 respondents (n=122 OCD & n=178 normal). Item-total correlations resulted in the deletion of five statements less than .30 loading. Independent sample t test also showed that OCD sample scored significantly high than normal population on the scale. Coefficient alpha of .931 also revealed that the newly developed scale is a highly reliable scale. The present scale can be used in clinical and research settings for the proper assessment and treatment of OCD.     

Keywords: Obsessive Compulsive Disorder, Qualitative Item Analysis, Foreign Language, Chronic Disorder