simCRSM function

simulate data according to CRSM

With this function data sets according to the Continous Rating Scale Model are simulated

simCRSM(itempar, disp, perspar, mid = 0.5, len = 1, seed = NULL)

Arguments

• itempar: a numerical vector with item parameters
• disp: a number setting the dispersion parameter for the item set
• perspar: a numerical vector with the person parameters
• mid: the midpoint of the response scale (on which the data set is generated)
• len: the length of the response scale (on which the data set is generated)
• seed: a seed for the random number generated can optionally be set

Returns

• datmat: simulated data set - true_itempar: the fixed item parameters according to the input - true_disppar: the fixed dispersion parameter according to the input - true_perspar: the fixed person parameters according to the input

Details

The midpoint and the length of the response scale define the interval of the data set generated. The default of the function generates data according to a response scale between 0 and 1 - that is midpoint 0.5 and length 1.

References

Mueller, H. (1987). A Rasch model for continuous ratings. Psychometrika, 52, 165-181.

See Also

simMPRM

Author(s)

Christine Hohensinn