Context of study:
32 participants completed a self-esteem questionnaire (scores can go from 0-40). Then they are scanned in a fMRI so we can see their brain activation. On one day, they drink alcohol. On another day they drink placebo.
In my SPSS sheet, I have 32 subjects. Each has a self-esteem score. Then I have variables for 5 brain regions. For each region, I have a fMRI activation score on placebo day and an activation score for the alcohol day.
We think that the level of self-esteem somehow impacts the level of brain activation.
What I did so far in SPSS:
Analyze -> General Linear Model -> Repeated Measures.
Then I correctly input in all 5 of my brain regions in the "Within-Subjects Variables".
Questions:
I do not know where to place the self-esteem scores. Do they go in the "between-subjects factor box" or the "covariates box"?
When I click the "options" button, what do you recommend I add to the analysis? And what do those options mean?
I'm a newbie to statistics. Your help is appreciated!
32 participants completed a self-esteem questionnaire (scores can go from 0-40). Then they are scanned in a fMRI so we can see their brain activation. On one day, they drink alcohol. On another day they drink placebo.
In my SPSS sheet, I have 32 subjects. Each has a self-esteem score. Then I have variables for 5 brain regions. For each region, I have a fMRI activation score on placebo day and an activation score for the alcohol day.
We think that the level of self-esteem somehow impacts the level of brain activation.
What I did so far in SPSS:
Analyze -> General Linear Model -> Repeated Measures.
Then I correctly input in all 5 of my brain regions in the "Within-Subjects Variables".
Questions:
I do not know where to place the self-esteem scores. Do they go in the "between-subjects factor box" or the "covariates box"?
When I click the "options" button, what do you recommend I add to the analysis? And what do those options mean?
I'm a newbie to statistics. Your help is appreciated!