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Random versus nonrandom assignment in controlled experiments: Do you get the same answer?
Shadish, William R., Ragsdale, KevinVolume:
64
Year:
1996
Language:
english
Journal:
Journal of Consulting and Clinical Psychology
DOI:
10.1037/0022-006x.64.6.1290
File:
PDF, 1.74 MB
english, 1996