Within-Subject Comparison (Paired T-Test)

Submitted by skuehn on Mon, 11/01/2010 - 01:53

Hi,

I am planning a study in which I want to measure two periods of resting state for each participants and want to compare them by means of paired-t-tests.
There are two ways of doing this: (1) stopping the scanner after the first resting period and restarting it for the second or (2) not stopping and restarting the scanner.
In task related fMRI one would not want to compare conditions that come from different scanning runs. Does the same apply for resting state? If so I assume that option (2) is better.
What would be your suggestion?

Forums: 
Resting-state fMRI topics

关于Utilities中REST power spectrum的一个问题

Submitted by dabaqaz on Wed, 10/27/2010 - 23:38

在使用Utilities中REST power spectrum时，顺利得到了某一个被试的频谱图。
但是，我想得到具体的频谱序列的值，不知道该怎么办？我查看了源代码，找到了‘theFreqSeries’这个变量，好像就是我需要的，计划增加几句代码将其输出到一个txt文件中。但感觉有点笨，不知道有没有更好的办法？或者REST软件本来已经有了，只是我没有找到？
另外，好像现在只能一个人一个人地计算频谱，我想给出两组被试各自的平均频谱，是否只能先一个一个地先算好了再计算平均值？
非常感谢各位老师在百忙中给予解答。