Feature-packed is Lertap 5. Have a browse of the topics listed below to get an idea of some of its features and capabilities.

 

•It's easy to use

•Heaps of documentation

•Simple but really powerful control language

•Graphs? (we got 'em, even with a gestalt capability)

•Context-sensitive help

•Sample datasets? You bet!

•Certification and licensing is here

•Looking for group differences (DIF+)

•Cheating detection

•Comprehensive item flags

•Advanced stuff