Tailored testing by Cliff's (1975) method of im plied orders was simulated through the use of re sponses gathered during conventional administra tion of the Stanford-Binet intelligence test. Tail oring eliminated approximately half the responses with only modest decreases in score reliability. Re sponses in tailored tests were shown by the Spear man-Brown prophecy formula to be equivalent to from 1.09 to 1.48 conventional items. Ninety-five percent of all responses implied by the tailoring procedures were identical to responses actually ob tained during live testing.
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