Obtained scores on an instrument seldom equal true scores because of:

Question

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Obtained scores on an instrument seldom equal true scores because of errors of measurement, which can be caused by various factors such as test-taker factors (e.g. fatigue, anxiety), tester factors (e.g. inconsistency in scoring), and instrument factors (e.g. ambiguous items). A and C are not accurate choices because errors of prediction and low factorability are not common reasons for obtained scores to differ from true scores. D is not a good answer because low validity implies that the instrument is not measuring what it is supposed to measure, but it does not necessarily lead to inconsistent obtained scores.

Obtained Scores on an Instrument Seldom Equal True Scores Because