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Download full textvan Engelenburg, Gijsbert – 1999
The Solomon four-group design (R. Solomon, 1949) is a very useful experimental design to investigate the main effect of a pretest and the interaction of pretest and treatment. Although the design was proposed half a century ago, no proper data analysis techniques have been available. This paper describes how data from the Solomon four-group design…
Descriptors: Foreign Countries, Maximum Likelihood Statistics, Outcomes of Treatment, Pretests Posttests
