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| Dvoupaměťový logistický model IRT (2PL)× | Mezisouhlas posuzovatelů (Cohenovo κ a ICC)× | |
|---|---|---|
| Obor | Psychometrika | Psychometrika |
| Rodina | Latent structure | Latent structure |
| Rok vzniku≠ | 1980 | 1960 (kappa); 1979 (ICC) |
| Tvůrce≠ | Frederic M. Lord | Cohen (kappa, 1960); Shrout & Fleiss (ICC, 1979) |
| Typ≠ | Item response model / latent trait model | Reliability / agreement analysis |
| Původní zdroj≠ | Lord, F. M. (1980). Applications of Item Response Theory to Practical Testing Problems. Erlbaum. link ↗ | Cohen, J. (1960). A Coefficient of Agreement for Nominal Scales. Educational and Psychological Measurement, 20(1), 37–46. DOI ↗ |
| Další názvy≠ | two-parameter logistic model, 2PL model, 2PL IRT — İki Parametreli Madde Tepki Modeli | inter-rater reliability, interrater agreement, rater agreement, Değerlendiriciler Arası Güvenilirlik (Cohen's κ, ICC) |
| Příbuzné | 6 | 6 |
| Shrnutí≠ | The two-parameter logistic item response model, formalised by Frederic Lord (1980), describes the probability that a respondent answers a binary test item correctly as a smooth S-shaped function of the respondent's latent ability. By estimating a separate discrimination parameter for each item alongside a difficulty parameter, 2PL allows items to differ in how sharply they distinguish high- from low-ability respondents — making it the standard model for large-scale educational and psychological assessments. | Interrater reliability quantifies the degree to which two or more independent raters produce consistent scores when evaluating the same individuals or products. The family encompasses Cohen's kappa, introduced in 1960 for categorical judgments, and the Intraclass Correlation Coefficient (ICC) for continuous ratings, together spanning most measurement scenarios encountered in behavioral, health, and educational research. |
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