Fraction Subtraction data (Tatsuoka, 2002) consists of responses of 536 examinees to 20 items measuring 8 attributes.

frac20

Format

A list of responses and Q-matrix with components:

dat

responses of 536 examinees to 20 items

Q

The \(20 \times 8\) Q-matrix

References

Tatsuoka, C. (2002). Data analytic methods for latent partially ordered classification models. Journal of the Royal Statistical Society, Series C, Applied Statistics, 51, 337-350.

Examples

if (FALSE) { mod1 <- GDINA(frac20$dat,frac20$Q,model="DINA") mod1 summary(mod1) # Higher order model mod2 <- GDINA(frac20$dat,frac20$Q,model="DINA",att.dist="higher.order") mod2 anova(mod1,mod2) }