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Table 4 Pre- and posttest results and related statistical data

From: Dr. Mosaik: a holistic framework for understanding the English tense–aspect system based on ontology engineering

  Range Mean Standard deviation Mean difference t P η2 Effect size
Traditional rules (control group)
n = 17 (17 students)
 Pretest 45% to 97% 77% 15.25 10% – 4.98 .000 0.61  
 Posttest 53% to 100% 87% 12.55
Dr. Mosaik 1
n = 20
 Pretest 56% to 100% 66% 8.46 20% – 9.21 .000 0.82 0.88
 Posttest 67% to 97% 86% 8.46
Dr. Mosaik 2
n = 11
 Pretest 56% to 86% 64% 16.7 26% – 8.94 .000 0.89 1.16
 Posttest 72% to 100% 90% 8.5