orlando_itemf: Orlando's statistic

In LatentREGpp: Item Response Theory Implemented in R and Cpp

Description

Calculate the values of the statistics S_x2 from Maria Orlando and David Thisen (2000).

Usage

orlando_itemf(patterns, G, zeta, model)

Arguments

patterns	list of patterns response (patterns$patterns), the frequency of each pattern (patterns$freq) and the latent traits (patterns$latent_traits).
G	number of quadrature points.
zeta	matrix of estimations of the parameters of the items (alphas, d's, guessing).
model	type of model ( "1PL", 2PL", "3PL" ).

Value

Orlando's statistic, degrees of freedom and p-value for each item.

References

Orlando, M. & Thissen, D. (2000). Likelihood-based item fit indices for dichotomous item response theory models. Applied Psychological Measurement, 24, 50-64.

See Also

z3_itemf

LatentREGpp documentation built on April 14, 2017, 11:55 a.m.