In the "internal method" of determining item discrimination values, the groups contrasted as having more or less of the trait are defined in terms of ___.

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In the internal method of determining item discrimination values, the groups contrasted as having more or less of the trait are defined in terms of their total score on the test. This method involves comparing the performance of the upper and lower groups on each item to see how well each item discriminates between those who have more of the trait being measured and those who have less.

In the "Internal Method" of Determining Item Discrimination Values, the Groups