Multilevel linear Model (hierachical linear models) - repeated?

Posted by LauraE on Aug 11, 2014; 9:50am
URL: http://spssx-discussion.165.s1.nabble.com/Multilevel-linear-Model-hierachical-linear-models-repeated-tp5726927.html

Hi,

based on the study
Miller, G., Tybur, J. M., & Jordan, D. B. (2007). Evolution and Human Behavior, 28, 375–381.
and Andy Fields explanation (Discovering SPSS;
http://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCUQFjAA&url=http%3A%2F%2Fwww.sagepub.com%2Ffield4e%2Fstudy%2Flabcoatleni%2Fchapter20.pdf&ei=Io7oU6u0KPHS4QSvr4HgCg&usg=AFQjCNF8NjwWAfHgwAx0An7HmiMg5AljlQ&bvm=bv.72676100,d.d2k

I tried to run a multilevel linear model for my own analysis, but I am not sure if it is correct.
I have a 2x2 within subject repeated measurement design. Dependent variable is money bid. Factors are A and B with 2 levels each. Participants see 25 pictures in each factor level (all in all 100 pictures, 25 pictures in A1B1, 25 in A2B1 and so on). Data are balanced, all participants see 25 pictures in each factor level.

Upper level should be subject ID, dependent variable is amount of money bid.
I tried to follow the example of Andy Field, with Analyze--mixed models linear.
subjects: Subject ID; repeated: none (is that correct???) and dependent variable bid with factors A and B. Fixed effects were added (main effect A, main effect B, interaction AxB), ID is added as a random effect (only intercept, because of the assumption that subjects vary in their amount of bid, some bid always little, some bid always higher).

Is this procedure OK or is there something wrong? I get dfs of more than 3000 (but I only have 33 subjects)... or do I have to somehow include somehting in repeated? If so, how?
And how do I get values for each factor level (i.e., values for A1B1, A2B1, A1B2, A2B2) in the table "estimates for fixed effects"?

Thanks a lot!
Laura