item characteristic curves

Submitted by kostas on Sun, 01/07/2012 - 21:04

Mobility dataset (8445 samples)

item characteristic curves from all the Mobility dataset (8445 samples)
without fit to a model. 
x axis: score (summary)
y axis: probability

item characteristic curves from all the dataset (8445 samples) based on ltm model.

Random Sample of Mobility dataset (600 samples)

item characteristic curves from a random sample of Mobility dataset (600 samples)
without fit to a model. 
x axis: score (summary)
y axis: probability

item characteristic curves from a random sample of Mobility dataset (600 samples) based on ltm model.