When does the actual determination of test difficulty occur?

The actual determination of test difficulty occurs after the test has been taken and scored because this is when the performance data of the test-takers are analyzed. By examining how many individuals answered each question correctly, instructors can assess the level of difficulty for each item. If a question was answered correctly by most individuals, it may be considered easier, while questions that very few participants got right may be classified as more difficult. This post-administration analysis allows for a precise evaluation of the test's difficulty level based on real performance data rather than assumptions or perceptions made prior to administering the test.

In contrast, determining difficulty before creating the test lacks empirical evidence, as it is largely based on expectations rather than actual performance metrics. Evaluating during test administration doesn’t provide necessary insights, as the scoring process happens afterward. Preparing test items involves creating questions but does not yield an accurate difficulty assessment until the actual test results are analyzed.