Interrupted Time Series Quasi - Gene V Glass Homepage Interrupted Time Series Quasi -Experiments1 Gene V Glass Arizona State University Researchers seek to establish causal relationships by conducting experiments. The standard for causal proof is what Campbell and Stanly (1963) called the "true experiment."
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike License. Your us Fundamentals of Program Evaluation Which study designs (next class) control to threats to validity? Experimental (randomized control trials) “gold standard” for assessing impact Controls threat to validity Quasi-experimental Controls some threats to valid
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Table 1: Campbell & Stanley's (1963) Threats to Internal Validity Campbell, D. T., & Stanley, J. C. (1963). Experimental and quasi-experimental designs. for research on ...