SPSS27 paired t-test 中的Cohen’s D – Effect Size for T-Test

Cohen’s D - Effect Size for T-Tests

两组数据是相关的且是连续的

计算绝对值 

Note that Cohen’s D ranges from -0.43 through -2.13. Some minimal guidelines are that

• d = 0.20 indicates a small effect,
• d = 0.50 indicates a medium effect and
• d = 0.80 indicates a large effect.

And there we have it. Roughly speaking, the effects for

• the anxiety (d = -0.43) and depression tests (d = -0.48) are medium;
• the compulsive behavior test (d = -0.71) is fairly large;
• the antisocial behavior test (d = -2.13) is absolutely huge.