Computer-adaptive sequential testing
Computer-adaptive sequential testing (CAST) is another term for multistage testing. A CAST test is a type of computer-adaptive test or computerized classification test that uses pre-defined groups of items called testlets rather than operating at the level of individual items. CAST is a term introduced by psychometricians working for the National Board of Medical Examiners. In CAST, the testlets are referred to as panels.
- Luecht, R.M. (2005). Some useful cost-benefit criteria for evaluating computer-based test delivery models and systems. Journal of Applied Testing Technology, 7(2). 
- Luecht, R. M. & Nungester, R. J. (1998). Some practical examples of computer-adaptive sequential testing. Journal of Educational Measurement, 35, 229–249.