Data are simulated with SIFILE= . See simulated data file. Simulated data files may contain extreme scores (zero, minimum possible and perfect,  maximum possible scores) by chance.

 

SIEXTREME = Yes

allow extreme score to be part of the simulated data.

 

SIEXTREME = No

avoid generating extreme scores in the simulated data. This may not be possible. This option may also produce measures which are more central than the generating values.

 

Example: In a study of differential item functioning extreme scores are not wanted:

SIEXTREME = No