Implications of the International Classification of Functioning, Disability and Health (ICF) on the development and use of tests in school settings are enumerated. We predict increased demand for behavioural assessments that consider a person's activities, participation and person-environment interactions, including measures that: (a) address…

Describes how the assumptions underlying the use of multiple regression are not satisfied in reliability generalization studies and introduces mixed effects modeling to overcome many shortcomings of traditional approaches. Provides an example using results from the Beck Depression Inventory. (SLD)