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ERIC Number: ED065551
Record Type: RIE
Publication Date: N/A
Pages: 7
Abstractor: N/A
Reference Count: 0
Confidence Weighting Plus Coombs-Type Response Options: A Good Idea That Failed.
Garvin, Alfred D.
Confidence weighting (CW) tends to improve the reliability of easy tests; the Coombs-type multiple-response (MR) option tends to improve the reliability of hard tests. It was hypothesized that, on a test of moderate difficulty, offering both the CW and MR response options would improve reliability more than either alone. Twenty-four subjects took a 20-item multiple-choice test under CW plus MR instructions. MR was used less than CW; 9 subjects used both options. Coefficient alphas computed on four scoring bases showed MR, alone, depressed reliability a little; CW, alone, depressed it a lot; and the two combined depressed it even more. It was concluded that these two previously successful special testing procedures cannot be combined to form an even better one. (Author)
Publication Type: N/A
Education Level: N/A
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