This dataset contains the responses of 60 persons to 12 items of a 3PL test, simulated with the sim_4pl() function, together with an id and the sex of each person. The item parameters are stored as attributes.
Format
A data.frame with 60 rows and 14 columns:
idperson id
sexsex of the person (
"m"or"w")Item1, ...,Item12the responses (0 or 1,
NA= not answered)
The item parameters are the attributes diffpar (difficulties), slopes, lowerA (lower asymptotes) and upperA (upper asymptotes, all 1), e.g. attr(fourpl_df, "diffpar").