A new type of portable rod frame test (K-type RFT) was introduced and was examined of its validity and reliability by test-retest method comparing with the Witkin type RFT (W-type RFT). Validity and reliability are relatively high;(1) the correlation of the two type RFT is+.767, which suggests sufficient validity of the test, (2) the reliability examined by test-retest method is fairly high (r=788), (3) sex difference exists, as is in W-type, (4) the mean error is significantly small in the second test of test-retest. The same tendency was also found in W-type RFT.
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Noriaki Kato (1965) studied this question.
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