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E-ISSN : 2733-4538
Ten years have passed since the publication of K-WAIS, but some Korean clinicians still prefer using KWIS. Their preference for KWIS may reflect certain doubts about the validity of K-WAIS on their part. The most serious of the doubts is derived from the fact that IQs measured on the basis of K-WAIS are very low compared with IQs measured on the basis of KWIS. However, lower IQs using a new version of an intelligence test relative to an old version is related to a rise of intelligence across generations (or cohorts). Thus, the phenomenon is not specific to Korea but found in most other countries as well. In addition, in Korea in which the rise of intelligence is estimated to be very steep during the past decades, it is only natural to expect that IQs measured on the basis of a new version are not just low, but very low compared with IQs measured on the basis of an old version. Thus, the view that IQs measured on the basis of K-WAIS are very low is an illusion derived from the preconception that IQs measured on the basis of KWIS are correct. Considering the fact that rise of intelligence in Korea was very steep, a use of KWIS should result in severe overestimation of true intelligence. Thus, use of K-WAIS is strongly recommended.
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