The benefits and costs of control groups shift as research is moved from laboratory to field settings. In field research, experimental and control groups are more likely to differ systematically on important dimensions other than independent variables. Comparisons...
CITATION STYLE
McKillip, J. (1992). Research without Control Groups (pp. 159–175). https://doi.org/10.1007/978-1-4899-2308-0_8
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