[R-meta] A dataset with 0 heterogeneity

[Dr. Guido Schwarzer]

Iago,

Values of tau2 and I2 equal to 0 mean that
- the assumption of a common underlying effect in all studies is plausible as
- all differences between individual study results can be explained by chance, i.e., random deviations due to (limited) sample sizes in individual studies.

Did you have a look at a forest plot? This should show an overlap of all study results to some extent.

Best,
Guido