Discussion
When two forms of the same test are administered on the same sample immediately one after the other, this procedure will allow the researcher to study :
Answer: B
The procedure studies reliability across content.
Giving two parallel (alternate) forms of a test one after the other, with no time gap, yields the alternate-forms reliability coefficient, which reflects consistency across different samples of items, that is, content sampling. Because there is no interval, changes over time do not enter.
Reliability across time requires a time gap between administrations (test-retest or delayed alternate forms). Construct and concurrent validity concern what the test measures and its relation to a criterion, not the agreement between two forms.
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