Researchers Are Testing Alternate-Forms Reliability When ______

Researchers are testing alternate-forms reliability when ______.

A) responses to the same questions by two randomly selected halves of a sample are about the same
B) they compare subjects' answers to slightly different versions of survey questions
C) measurement showing that measures of a phenomenon at two points in time are highly correlated
D) they calculate reliability based on the correlation among multiple items used to measure a single concept

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