CDM (version 2.7-7)

data.fraction1: Fraction Subtraction Dataset 1

Description

This is the fraction subtraction data set with 536 students and 15 items. The Q-matrix was defined in de la Torre (2009).

Usage

data(data.fraction1)

format

This dataset is a list with the dataset (data) and the Q-matrix as entries. The format is: List of 2 $ data :'data.frame': ..$ T01: int [1:536] 0 1 1 1 0 0 0 0 0 0 ... ..$ T02: int [1:536] 1 1 1 1 1 0 0 1 0 0 ... ..$ T03: int [1:536] 0 1 1 1 1 1 0 0 0 0 ... ..$ T04: int [1:536] 1 1 1 0 0 0 0 0 0 0 ... ..$ T05: int [1:536] 0 1 0 0 0 1 1 0 1 1 ... ..$ T06: int [1:536] 1 1 0 1 0 0 0 0 0 0 ... ..$ T07: int [1:536] 1 1 0 1 0 0 0 0 0 0 ... ..$ T08: int [1:536] 1 1 0 1 1 0 0 0 1 1 ... ..$ T09: int [1:536] 1 1 1 1 0 1 0 0 1 0 ... ..$ T10: int [1:536] 1 1 1 0 0 0 0 0 0 0 ... ..$ T11: int [1:536] 1 1 1 1 0 0 0 0 0 0 ... ..$ T12: int [1:536] 0 1 0 0 0 0 0 0 0 0 ... ..$ T13: int [1:536] 1 1 0 1 0 0 0 0 0 0 ... ..$ T14: int [1:536] 1 1 0 0 0 0 0 0 0 0 ... ..$ T15: int [1:536] 1 1 0 1 0 0 0 0 0 0 ... $ q.matrix: int [1:15, 1:5] 1 1 1 1 0 1 1 1 1 1 ... ..- attr(*, "dimnames")=List of 2 .. ..$ : chr [1:15] "T01" "T02" "T03" "T04" ... .. ..$ : chr [1:5] "QT1" "QT2" "QT3" "QT4" ...

source

See fraction.subtraction.data for more information about data source.

Example Index

gdm (Example 1), lsdm (Example 4, sirt)

References

de la Torre, J. (2009). DINA model parameter estimation: A didactic. Journal of Educational and Behavioral Statistics, 34, 115--130.