Fellow researchers,
I do have 25 studies which have reported 'age' and 'internal motivation' in their correlation matrix tables. The correlation matrix of each study reports the mean of 'age' of participants and mean of 'internal motivation' scale.
I am thinking to run a regression using the 'mean scores' of 'age' and 'internal motivation' to see how internal motivation change by age. However, I am not sure if this method in true.
Any idea would be appreciated!