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Table 3 Accuracy before and after discussion by class

From: Why does peer instruction benefit student learning?

ClassPre-correct (mean)Post-correct (mean)SD of differencePaired t testCohen’s d
Cognitive Psych (Psych) 20150.670.760.27t (60) = 2.40, p = 0.020.31
Cognitive Psych (Psych) 20170.650.730.21t (59) = 2.75, p = 0.0070.36
Decision Making (Ed Psych) 20160.57.660.13t (23) = 3.30, p = 0.0030.69
Decision Making (Ed Psych) 20170.710.750.13t (36) = 1.92, p = 0.060.32
Learning Theories (Ed Psych) 20160.580.690.06t (11) = 5.76, p < 0.0011.74
Learning Theories (Ed Psych) 20180.570.610.09t (13) = 2.00, p = 0.070.56
Overall0.650.720.20t (212) = 5.39, p < 0.0010.37