E-ISSN : 2733-4538
This study addressed three issues in clinical use of K-WAIS. First, a clinician frequently faces the situation in which a subject's premorbid intelligence should be estimated. This study provides VIQ, PIQ, FIQ means for 25 subgroups of the K-WAIS standardization sample. These data can be used for estimating a subject's premorbid intelligence based on his/her age and years of education. Second, how big a difference between VIQ and PIQ may be interpreted as clinically significant? An investigation of 201 normal subjects indicates that a 17-point difference is required at 15% significance level and a 23-point difference is required at 5% significance level. Third, which age norm should be utilized, for example, for a 34-year-and-11-month old subject? A proposed solution is to take the mid-points of the two sets of results, one based on the 23~34 age norm and the other based on the 35~44 age norm.