This dataset contains the responses of a sample of 1510 examinees to 12 binary items on Mathematics. It has been extrapolated from a larger dataset collected in 1996 by the Educational Testing Service within the National Assessment of Educational Progress (NAEP) project.
A data frame with 1510 observations on the following 12 items:
round to thousand place
write fraction that represents shaded region
multiply two negative integers
reason about sample space (number correct)
find amount of restaurant tip
identify representative sample
read dials on a meter
find (x, y) solution of linear equation
translate words to symbols
find number of diagonals in polygon from a vertex
find perimeter (quadrilateral)
reason about betweenness
Bartolucci, F. and Forcina, A. (2005), Likelihood inference on the underlying structure of IRT models. Psychometrika, 70, 31-43.
Bartolucci, F. (2007), A class of multidimensional IRT models for testing unidimensionality and clustering items. Psychometrika, 72, 141-157.
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