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| Short-form item analysis× | Item Response Theory (IRT)× | |
|---|---|---|
| Fagområde | Psykometri | Psykometri |
| Familie | Latent structure | Latent structure |
| Oprindelsesår≠ | 1990s–2000s | 1952–1968 |
| Ophavsperson≠ | Psychometric tradition; methodological articulation by Smith, McCarthy & Anderson (2000) | Frederic M. Lord (and Allan Birnbaum for the 2PL/3PL models) |
| Type≠ | Item selection and evaluation procedure | Probabilistic measurement model |
| Oprindelig kilde≠ | Smith, G. T., McCarthy, D. M., & Anderson, K. G. (2000). On the sins of short-form development. Psychological Assessment, 12(1), 102–111. DOI ↗ | Lord, F. M. & Novick, M. R. (1968). Statistical Theories of Mental Test Scores. Addison-Wesley. link ↗ |
| Aliasser | abbreviated scale item analysis, short-scale item evaluation, item screening for short forms, SFIA | IRT, latent trait theory, item characteristic curve theory, modern test theory |
| Relaterede≠ | 4 | 5 |
| Resumé≠ | Short-form item analysis is the systematic psychometric evaluation and selection of items when constructing an abbreviated version of a longer measurement instrument. It applies classical and modern item-analysis criteria — item-total correlations, reliability estimates, and factor structure — to identify the smallest item subset that preserves the original scale's psychometric integrity. | Item response theory models the probability that a respondent answers an item correctly (or endorses it) as a function of the respondent's latent trait level and the item's own statistical properties — difficulty, discrimination, and guessing. Unlike classical test theory, IRT places persons and items on the same scale, yielding measurement that is sample-independent for items and test-independent for persons. |
| ScholarGateDatasæt ↗ |
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