Examiners commonly scramble the Wechsler Adult Intelligence Scale-Revised blocks without adhering to surface variety requirements specified in the manual. The standardized block presentation and an extreme departure from the standardized procedure were compared using 60 normal adults as subjects. Method of block presentation did not result in performance differences for raw score, number of items passed or failed, or mean time for completed designs. Neither split-half reliability coefficients nor performance as a function of IQ, age, or gender were influenced by method of block presentation. The implications for practitioners are discussed.
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