My study involves testing infants at multiple time point using multiple tests.
I used a multiple regression to establish which behavioural variables could predict severity of outcome score at the end of the testing. So i am testing infants at 14 months and seeing which scores from each variable could predict better or worse scores at 24 months.
my model works fine, but now I want to use this regression model to see whether it can predict 24m outcome on a new dataset with new infants that have been tested on the same IV' s and DV's.
Does anyone know how I might go about doing this?