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Download full textJaciw, Andrew; Newman, Denis – Society for Research on Educational Effectiveness, 2011
The purpose of the current work is to apply several main principles of the causal explanatory approach for establishing external validity to the experimental arena. By spanning the paradigm of the experimental approach and the school of program evaluation founded by Lee Cronbach and colleagues, the authors address the question of how research…
Descriptors: Validity, Experiments, Research Methodology, Generalization
