Differential Weight Procedure of the Conditional P.D.F. Approach for Estimating the Operating Characteristics of Discrete Item Responses [microform] / Fumiko Samejima.
A method is proposed that increases the accuracies of estimation of the operating characteristics of discrete item responses, especially when the true operating characteristic is represented by a steep curve, and also at the lower and upper ends of the ability distribution where the estimation tends...
Saved in:
| Online Access: |
Request ERIC Document |
|---|---|
| Main Author: | |
| Corporate Author: | |
| Format: | Microfilm Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
Distributed by ERIC Clearinghouse,
1990.
|
| Subjects: |
| Summary: | A method is proposed that increases the accuracies of estimation of the operating characteristics of discrete item responses, especially when the true operating characteristic is represented by a steep curve, and also at the lower and upper ends of the ability distribution where the estimation tends to be inaccurate because of the smaller number of subjects in the base data. This technique is called the Differential Weight Procedure and belongs to the conditions P.D.F. approach. The method is illustrated with simulated data based on conventional testing, with 100 dichotomous items in 4 subtests of 25 items each given to 6,000 hypothetical examinees and adaptive testing in which each of 50 binary items has been given to 1,500 hypothetical subjects out of 15,000. Fifteen graphs illustrate these applications. The sensitivities of the resulting estimated operating characteristics to irregularities of the differential weight functions are discussed and usefulness of the method is reviewed. (SLD) |
|---|---|
| Item Description: | Sponsoring Agency: Office of Naval Research, Arlington, VA. Cognitive and Neural Sciences Div. Contract Number: N00014-87-K-0320-4421-549. ERIC Document Number: ED323253. |
| Physical Description: | 40 pages |
| Reproduction Note: | Microfiche. |
| Action Note: | committed to retain |