Item parameter estimates for the 2PL model, estimated with ltm from the example data set Scored. These are provided as a check, and to speed up the examples for the various functions in the package.
Unscored
(Package: irtoys) :
Original, unscored multiple-choice responses to a test
Real-life data set containing the responses to a test, before they have been recoded as true or false. Can be used with only two functions in the package: sco and npp. All other functions expect binary data, which can be produced with sco.
providing 
.