May 2011

关于alphasim校正的问题

Submitted by liufeng on Mon, 05/02/2011 - 20:42

我想问的问题是我用alphasim校正，用了三组。首先p=0.005算出cluster size是406，用p=0.001算出cluster size是183，用p=0.01算出cluster是624；我选的cluster size都是第一个alpha小于0.05所对应的size。那么他们的结果都是产生了一个p=0.05的校正吧？如果是，我分别用三组校正去看我的spmt0001.img，校正后的结果不一样。

p=0.001cluster size183这一组最强，校正后没有任何结果，p=0.01cluster624这一组校正最弱，出来很多结果。我想问一下如果都是模拟的p=0.05，那么出来的结果为什么不一样呢。

期待您的回复！

Forums: 
Resting-state fMRI topics

Rest 2 sample T test error

Submitted by yhcha@mednet.uc... on Sun, 05/01/2011 - 12:25

Hi everyone, With great help from this forum, I was able to get the first level analsysis done through DPARSF. I am trying to do a two sample T test with 5 patients and 5 controls. I add an age text file as the covariate. I get this error message below.
Thanks for your help in getting past this hurdle.
Yoon-Hee

Forums: 
Resting-state fMRI topics