IRT models | \(\eta _{im}^{(j)}\) | (r,F, Z _{ q },U _{ a } ) |
---|---|---|
Rating scale model | \(\theta _{i}-\left (\delta _{m}+\tau _{j}\right)\) | (adjacent,logistic, Z _{2},U _{1} ) |
Partial credit model | θ _{ i }−δ _{ jm } | (adjacent,logistic, Z _{1},U _{1} ) |
Sequential Rasch model | θ _{ i }−δ _{ jm } | (sequential,logistic, Z _{1},U _{1} ) |
Graded response model | \(\alpha _{j}\left (\theta _{i}-\delta _{jm}\right)\) | (cumulative,logistic,nl) |
Generalized partial credit model | \(\alpha _{j}\left (\theta _{i}-\delta _{jm}\right)\) | (adjacent,logistic,nl) |