Estimating Premorbid IQ From Demographic Variables : A Comparison of A Regression Equation vs Clinical Judgement  

Oleh:

Milne, Alan B. ; Crawford, John R. ; Millar, Jane

Jenis: Article from Bulletin/Magazine
Dalam koleksi: British Journal of Clinical Psychology vol. 40 no. 1 (2001), page 97-106.
Topik: CLINICAL PATHOLOGY; premobid IQ; demographic; regression equation; clinical judgement

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: BB60.3 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Objectives. To assess the accuracy with which clinicians estimate premorbid IQ from demographic variables and compare it with a regression equation which uses the same information. Design. Repeated measures and correlational. Methods. Sixty participants were administered the WAIS - R and had their demographic variables recorded (age, sex, years of education and occupation). Eight clinical psychologists estimated the participants' IQs from the demographic variables. Estimated IQs were also obtained using a regression equation developed by Crawford and Allan (1997). Results. The correlation between obtained IQ and the equation - based estimate was significantly higher than the correlation between obtained IQ and the clinicians' estimates. Further, mean estimated IQ from the regression equation did not differ significantly from obtained IQ whereas the means for four of the eight clinicians' estimates did differ significantly. Conclusions. Demographic - based regression equations can provide unbiased and useful estimates of premorbid IQ; these estimates can be modified in the light of the additional qualitative information available to the clinician.

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