Description Usage Format Note Source References See Also

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.

1 |

The `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.

The dataset `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
publicly).

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/.

See `DAKS-package`

for general information about this
package.

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