Lertap5

Author: Larry Nelson
Contact: https://lertap5.com/store/index.html?about_the_author.htm
Description: Lertap is a software system used to process and analyze data collected from quizzes, exams, tests, and surveys. Lertap is an acronym for the Laboratory of Educational Research Test Analysis Package. It dates way back to 1973. Lertap 5, the latest genre, works with Microsoft's spreadsheet program, Excel. There are versions for Macintosh and Windows computers. Lertap 5's forte is item analysis and test scoring. The majority of the statistics it produces are solidly based on CTT, classical test theory. It will handle polytomous cognitive and affective items (such as rating scales), with extensive support for partial-credit item scoring. A virtual cornucopia of charts and graphs is a salient feature of Lertap 5. Lertap is free for students to use.
Analyses: DIF
System Requirements: Excel and Windows or Mac
Measurement Model: Classical
License Type: Commercial
Documentation: manual, sample data, online help