Hello Gang,

I am revisiting the discussion of the question above. The 3dDeconvolve is pasted at the end of the post. For the amplitude modulation, there are 2 behavioral measures that were associated with each TR (RT and confidence). Above there are 24 sub-bricks associated with one glt condition. I was wondering which sub-bricks represents the "intercept" that corresponds to the condition effect when the modulatory variable is adjusted at its center value? Meaning, that the condition effect has therefore has been controlled for, for the behavioral variables? In addition, within the 3dDeconvolve command, does the gltlsym flag automatically use intercept sub-bricks to create the glt? As an example, I am currently using coefficients generated from glt_label 9 as input to the population level and assumed it represented the condition effect when the modulatory variable is adjusted at its center value. Is this correct?

As a follow-up to that, we are also interested in the slope effects, the modulation of the two behavioral variables. Specifically, we would like to look at the modulation of each variable separately so that we generate a brain map of only RT modulation and a second brain map of only confidence modulation. Is this possible? If so, how would we go about separating these effects?

Thank you,
Catherine



Edited 2 time(s). Last edit at 09/10/2021 02:25PM by Catherine Tallman.