Hedlund and Mills have investigated the scorer reliability and validity of the KTSA. On the basis of their work one cannot conclude that the KTSA lacks either scorer reliability or validity, since it is apparent that the individuals used as judges in the study varied from very skilled and experienced to poorly experienced persons. The studies do suggest strongly, however, that the KTSA should be considered a test requiring at least as intensive training and supervised experience as is given to other psychological tests such as the WAIS and the Rorschach.
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