Hello
If i want to calculate IQ, DQ and SQ of my subject using Seguin form Board Test (SFBT), Developmental Screening Test (DST) and Vineland Social Maturity Scale (VSMS) respectively. Suppose age of my subject is 22 years who have been diagnosed with intellectual disability. Suppose his Mental age comes out to be 10 according to SFBT, his developmental age comes to be 9 according to DST and his Social age comes to be 12 according to SFBT. So what we will take in denominator for calculating his IQ,DQ,SQ? As these scales are only meant for not above age range of 15 so will we take it to be 15 ? or we will take the original chronological age of 25?
Thank You :)
As far as i know SFbt 3.6 to 15 age limit (chronological) and vineland 15 limit as well. We can't use these scales on 22 yr old person.
As per my knowledge chronological age should be 16 years. Uzma is right.
@Uzma and @Dheeraj, why 16, why not 15?. I think it completely depends on the test, so some tests like DST and VSMS suggest 15, while BKT and PAT manuals suggests 16. But if you are not following the manual you need a logic supported by evidence to use any other age, that is not mentioned in the manual.
CA for any age above 15 is automatically calculated as 15 (i.e. Max CA is 15 years), can say that with surety for VSMS at least.
Sarah Javed
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