During my data analysis I decided to compare the use of a couple different glt matricies.
I am looking at two different variables vs the base line and each other(hits and misses). When I use 3 different glt matricies that look like
001111100000
000000011111
0011111-1-1-1-1-1
with a max lag of 4 I get reasonably good, statistically sig. voxel activation when comparing hits-misses, but fairly poor activation with the hits or misses to base line.
I get the opposite when I decrease the parameters to a min lag of 1 and max lag of 3. I get good activation with the hits or misses to base line and poor activation with hits-misses.
Is there some intrisic difference between comparing a variable to base line and comparing 2 variables?
I apologize is my question is basic or if am just looking at my data all wrong.
Any clarification would be extremely helpfull!
Thank you so much.
jeremy