What Affects the Quality of Score Transformations? Potential Issues in True-Score Equating Using the Partial Credit Model.

ABSTRACT: This simulation study investigated to what extent departures from construct similarity as well as differences in the difficulty and targeting of scales impact the score transformation when scales are equated by means of concurrent calibration using the partial credit model with a common person design. Practical implications of the simulation results are discussed with a focus on scale equating in health-related research settings. The study simulated data for two scales, varying the number of items and the sample sizes. The factor correlation between scales was used to operationalize construct similarity. Targeting of the scales was operationalized through increasing departure from equal difficulty and by varying the dispersion of the item and person parameters in each scale. The results sh

SUBMITTER: Fellinghauer C 

PROVIDER: S-EPMC10638984 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature