The Slosson Intelligence Test (SIT), designed to be used by professionals who need to evaluate an individual's mental ability, is reviewed. It is concluded that the SIT can be accurately described as a test whose items are nearly 30 years old, whose IQ scores are derived from a nonrepresentative norm group of which at least part is 23 years old, and which estimates IQ scores of an older version of the Stanford Binet (SB). It is further concluded that SIT IQ scores are not interchangeable with other IQ measures such as the SB-LM, the SB Intelligence Scale: Fourth Edition, or the WISC-R. Thus, we find the SIT unsuited for educational decision-making purposes, including screening, identification, and placement processes.
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