Hello all!

My name is Michael and I’m a new AFNI user. I’ve tried to search for some literature from AFNI regarding the use of AM2 for stim_types and understanding the output of AM2. I know that using AM2 gives you 2 regressors per condition (Beta for mean, and Beta for amplitude modulation), but I’m still unsure as to the statistical results of it.

My question is: When viewing F-stats for a single condition, what exactly do those stats mean (how are the mean & modulation regressors interpreted together)?

Also, if there’s any literature you can direct me to for understanding the F-stats it would be much appreciated!