Indian Journal of Psychological Medicine
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Year : 2015  |  Volume : 37  |  Issue : 2  |  Page : 149-153

Issues related to obtaining intelligence quotient-matched controls in autism research

St. John's Medical College Hospital, Bengaluru, Karnataka, India

Correspondence Address:
Dr. Ashok V Mysore
St. John's Medical College Hospital, Bengaluru, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0253-7176.155612

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Background: Intelligence Quotient (IQ) is considered to be an index of global cognitive functioning and has traditionally been used as a fulcral measure in case-control studies in neuro-developmental disorders such as autism. Aim: The aim is to highlight the issues of "matching for IQ" with controls in autism research. Materials and Methods: Percentile scores on the Coloured Progressive Matrices of 20 children with autism in the age range of 5 to 12 years have been graphically compared with 21 age matched typically developing children. Results and Conclusions: The percentile scores of the so-called high functioning children with autism from special schools were well below that of typically developing children. There are many challenges when using IQ in case-control studies of autism. Alternative approaches need to be considered.

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