Software

Computerized adaptive testing (CAT) is a sophisticated approach for delivering tests, surveys, and other measurements. It is based on complex computer algorithms that adapt the test to each examinee while also controlling for practical issues such as content distribution, item exposure, and test length. CATs have been shown to reduce test length by up to 90% without a loss of precision. However, to achieve such a reduction and make use of the advantages of CAT, it is absolutely essential that the CAT developer perform research studies to simulate the performance of CATs. CATSim is the only software program that completely fills this role.

DFIT 8 is a powerful Windows program to analyze differential item and test functioning utilizing the DFIT framework that evaluates the differences between item response functions. DFIT 8 allows you to compare item response theory curves for different subgroups.

FastTEST Pro 2.0 makes it easy and efficient for you to develop and implement a wide range of PC-based electronic tests. Tests can be conventional, randomized, branched, or fully adaptive tests based on item response theory (IRT). Designed to allow you to set up your own secure testing lab, FastTEST Pro's distributed computing design delivered tests on a network, on independent testing stations, from CDs or USB memory drives, or sent as email attachments and easily installed and delivered on remote computers.

HLM 7, Hierarchical Linear Modeling, allows for the analysis of models with two or three levels of nesting (i.e., multilevel analysis). Such nested models may be used to analyze growth and change within individuals; to study responses of persons in organizations such as schools, businesses, community, and religious groups; and to conduct meta-analysis of research results.