Comparar métodos

	Modelo de Respuesta Graduada (GRM)	Modelo logístico de tres parámetros (3PL)
Campo	Psicometría	Psicometría
Familia	Latent structure	Latent structure
Año de origen	1969	1968
Autor original	Fumiko Samejima	Allan Birnbaum
Tipo	Item response theory / polytomous IRT model	Item response model / latent trait model
Fuente seminal	Samejima, F. (1969). Estimation of Latent Ability Using a Response Pattern of Graded Scores. Psychometrika Monograph Supplement, No. 17.	Birnbaum, A. (1968). Some latent trait models and their use in inferring an examinee's ability. In F. M. Lord & M. R. Novick (Eds.), Statistical theories of mental test scores (pp. 397–479). Addison-Wesley.
Alias	Samejima's GRM, Derecelendirilmiş Tepki Modeli (GRM), graded IRT model	3PL IRT — Üç Parametreli Madde Tepki Modeli, three-parameter logistic model, 3PLM, Birnbaum model
Relacionados	7	5
Resumen	The Graded Response Model is an item response theory model developed by Fumiko Samejima in 1969 for ordered polytomous items such as Likert-type scales. It estimates both the discriminating power of each item and a set of threshold parameters marking the boundaries between adjacent response categories, while simultaneously placing persons on a continuous latent trait scale.	The three-parameter logistic (3PL) model, introduced by Allan Birnbaum in 1968, is an item response theory model that describes the probability of a correct response to a binary test item as a function of three item-level parameters — difficulty, discrimination, and a lower asymptote representing guessing — and one person-level parameter representing latent ability.