orlando_itemf: Orlando's statistic

Description Usage Arguments Value Author(s) References See Also Examples

Description

calculates the S-X2 values from Maria Orlando and David Thisen.

Usage

1
orlando_itemf(patterns, G, zita, model)

Arguments

G

number of quadrature Points

model

type of model ( "1PL", 2PL", "3PL" )

patterns:

matrix of patterns response, the frequency of each pattern and the latent traits

zita:

matrix of estimations of the parameters of the items (discrimination,difficulty, guessing)

Value

Orlando's statistic, degrees of freedom and pvalue for each item

Author(s)

SICS Research, National University of Colombia ammontenegrod@unal.edu.co

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, x2_itemf

Examples

1

SICSresearch/IRTpp_old documentation built on May 9, 2019, 11:12 a.m.