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Download full textMa, Lingling; Cronin, John – Northwest Evaluation Association, 2009
Virtual Comparison Groups (VCG) were developed by the Northwest Evaluation Association as an alternative to conventional controlled experiments for social science researchers working in the field of education. The VCG is generally a group of up to 51 students who are matched, based on key characteristics of the student and school, to a single…
Descriptors: Social Science Research, Comparative Analysis, Sampling, Student Characteristics
