You mentioned that research of respected psychometricians supports the decision of CFA Institute to use three-choice questions. Can you give me some examples?
We considered educational research which questions the value of developing more than two distractors (incorrect choices) for multiple-choice items. Dr. Thomas Haladyna and Dr. Steve Downing, two recognized leaders in testing research, argue that most items used in well-developed standardized tests contained only one or two good distractors, suggesting that item writers should focus their efforts on the quality, not the quantity, of the distractors. For discussions, see Writing Test Items to Evaluate Higher Order Thinking (Haladyna) and Handbook of Test Development (Haladyna and Downing). In addition, a 2005 article by Dr. Michael Rodriguez in Educational Measurement: Issues and Practice summarizing 80 years of empirical evidence clearly supports the use of three-option (two-distractor) test items.
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