Math20SG
(Package: SNSequate) :
Bivariate score frequencies on two 20-items mathematics tests.
The data set contains the bivariate sample frequencies of number-right scores for two parallel 20-items mathematics tests given to a sample from a national population of examinees. This data has been described and analized by Holland and Thayer (1989); Von Davier et al, (2004).
KB36
(Package: SNSequate) :
Data on two 36-items test forms
The data set contains both response patterns and item parameters estimates following a 3PL model for two 36-items tests forms. Form X was administered to 1655 examinees and form Y to 1638 examinees. Also, 12 out of the 36 items are common between both test forms (items 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36). This data has been described and analized by Kolen and Brennan (2004).
CBdata
(Package: SNSequate) :
Observed (raw) score values for two different tests
The data set is from a small field study from an international testing program. It contains the observed scores for two tests X (with 75 items) and Y (with 76 items) administered to two independent, random samples of examinees from a single population P. For more details, see Chapter 9 in Von Davier et al, (2004) from where the data were obtained.
ACTmKB
(Package: SNSequate) :
Scores on two 40-items ACT mathematics test forms
The data set contains raw sample frequencies of number-right scores for two multiple choice 40-items mathematics tests forms. Form X was administered to 4329 examinees and form Y to 4152 examinees. This data has been described and analized by Kolen and Brennan (2004).
Math20EG
(Package: SNSequate) :
Scores on two 20-items mathematics tests.
The data set contains raw sample frequencies of number-right scores for two parallel 20-items mathematics tests given to two samples from a national population of examinees. This data has been described and analized by Holland and Thayer (1989); Von Davier et al, (2004) (see also Von Davier, 2011 where other applications using these data set are shown).
KB36.1PL
(Package: SNSequate) :
Difficulty parameter estimates for KB36 data under a 1PL model
This data set contains the estimated item difficuty parameters for the KB36 data, assuming a 1PL model. Two sets of parameters estimates for test forms X and Y are available: one that results from a fit assuming the traditional logistic link, and one which comes from the fit using a cloglog (asymmetric) link.
providing 
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