The most useful procedure for determining the reliability of a speeded test is to apply one of the internal consistency formulas.

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Speeded tests, where the primary challenge is completing the tasks in a limited time, are not best evaluated for reliability using internal consistency formulas because these formulas assume that all items measure the same construct to the same degree, which might not be applicable in speeded tests. Instead, test-retest reliability or alternative forms reliability are more appropriate measures for speeded tests.

The Most Useful Procedure for Determining the Reliability of a Speeded