计算gpower中重复测量的功率

时间:2018-03-08 18:26:44

标签: anova

我正在尝试为GPower中的重复测量设计计算功率。我有信心我的设计作为单一测量ANOVA得到了正确的结果: 2个因素,每个3个级别:

F tests - ANOVA: Fixed effects, special, main effects and interactions
Analysis:   A priori: Compute required sample size 
Input:  Effect size f   =   .4
α err prob  =   0.05
Power (1-β err prob)    =   .8
Numerator df    =   2
Number of groups    =   6
Output: Noncentrality parameter λ   =   10.240000
Critical F  =   3.155932
Denominator df  =   58
Total sample size   =   64
Actual power    =   0.803690

然后这是我重复msrs的设置:

F tests - ANOVA: Repeated measures, within-between interaction
Analysis:   A priori: Compute required sample size 
Input:  Effect size f   =   .4
α err prob  =   0.05
Power (1-β err prob)    =   .8
Number of groups    =   6
Repetitions =   4
Corr among rep measures =   0.5
Nonsphericity correction ε  =   1
Output: Noncentrality parameter λ   =   30.720000
Critical F  =   1.855810
Numerator df    =   15.000000
Denominator df  =   54.000000
Total sample size   =   24
Actual power    =   0.917180

问题是:重复的msrs作为单一测量,我的组编号是否相同?  -are .5相关性和1非球面校正标准?这些参数是从设计中得出的吗?

谢谢!

0 个答案:

没有答案