Development And Content Validation Of An Indigenous Diagnostic Questionnaire Of Intellectual Disability

Even though in the last decade, there has been a considerable increase in the prevalence of intellectual disability in Pakistan, there is scarcity of indigenous standardized diagnostic questionnaire for intellectual disability. Thus, the present study aimed to evaluate the content validity of the Indigenous Diagnostic Questionnaire of Intellectual Disability (IDQID) 1designed in accordance with the Pakistani society’s norms. IDQID was designed to diagnose intellectual disability for 6-18 years old. Mixed method research design was used in the development and content validation phase. Purposive sampling strategy was used to recruit participants for expert panel review (n=10). Content validity index was used to assess the relevance and representativeness of the questionnaire. The scale level content validity index by averaging calculation method and by universal agreement method was 0.87 and 0.209 respectively. A total of 168 items with I-CVI greater than or equal to 0.78 were retained. Given the time efficient, cost effective and multidimensional nature of the questionnaire, mental health practitioners should use this questionnaire to evaluate intellectual disability in children.