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Direct linkSteiner, Peter M.; Cook, Thomas D.; Li, Wei; Clark, M. H. – Journal of Research on Educational Effectiveness, 2015
In observational studies, selection bias will be completely removed only if the selection mechanism is ignorable, namely, all confounders of treatment selection and potential outcomes are reliably measured. Ideally, well-grounded substantive theories about the selection process and outcome-generating model are used to generate the sample of…
Descriptors: Quasiexperimental Design, Bias, Selection, Observation
Peer reviewedReichardt, Charles S.; Cook, Thomas D. – Evaluation and Program Planning: An International Journal, 1980
How some of the past literature creates the impression of an inevitable method-paradigm linkage and of a forced choice between qualitative and quantitative paradigms is shown. Difficulties of making method choices are considered. It is suggested that purposefully developed strengths of different methods should not be ignored. (Author/GK)
Descriptors: Case Studies, Evaluation Methods, Input Output Analysis, Interviews
