The accompanying binary dataset is part of the empirical 2003 Programme for International Student Assessment (PISA) data. It contains the item responses by 340 German students on a 5-item dichotomously scored mathematical literacy test.
pisa data frame consists of 340 rows and 5
columns, representing the response patterns of the students to the
test items. Each number, an integer, 1 or 0, encodes a
correct or incorrect response, respectively.
pisa was obtained after dichotomizing the
original multiple-choice or open format test data. Wording of the
test items used in the assessment is not known (not available
OECD Programme for International Student Assessment (PISA; http://www.pisa.oecd.org/)
Sargin, A. and Uenlue, A. (2009) Inductive item tree analysis: Corrections, improvements, and comparisons. Mathematical Social Sciences, 58, 376–392.
Uenlue, A. and Sargin, A. (2010) DAKS: An R package for data analysis methods in knowledge space theory. Journal of Statistical Software, 37(2), 1–31. URL http://www.jstatsoft.org/v37/i02/.
DAKS-package for general information about this
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