It is proposed to describe the speededness of a test by a new statistic, the Speededness Quotient (SQ). The SQ is derived by dividing the total number of unattempted items by the total number of errors. It is suggested that test publishers should report the SQ of a test especially when reporting the reliability as an odd‐even correlation coefficient.
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R. E. Stafford (1971) studied this question.
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