Package index

All functions

CTTsub()

This main function estimates true subscores using different methods based on original CTT scores.

data.prep()

This function prepares data into a required list format

scored.data

Sample scored data

subscore.corr()

Computing correlation indices for subscores and the total score.

subscore.s()

Computing subscores using Haberman's method based on observed subscores.

subscore.sx()

Computing subscores using Haberman's method based on both observed total scores and observed subscores.

subscore.Wainer()

Estimating true subscores using Wainer's augmentation method

subscore.x()

Computing subscores using Haberman's method based on observed total scores.

test.data

A list of objects that include both test information and subscores.

TIMSS11G8M.data

The 2011 TIMSS Grade 8 Mathematics Assessment Dataset

Yen.OPI()

Estimating true subscores using Yen's OPI

Yen.Q3()

Computing Yen's Q3 statistic for unidimensional Rasch, 1-, 2-, and 3-PL logistic IRT models