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TABLE 5. Effect Size by Type of Research Design

Research design
Effect size
 Experiment
 Quasi-experiment
 Pre–post
 Grand total
 Experiment
 Quasi-experiment
 Pre–post
Low 6 3 3 12 50.00% 25.00% 25.00%
Medium 5 5 4 14 41.67% 41.67% 33.33%
High 1 4 5 10 8.33% 33.33% 41.67%
Grand total
 12
 12
 12
 36






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