Actually, even with many studies and a meta-analysis, you can still get blindsided by publication bias. There are plenty of psi meta-analyses showing positive effects (with studies that were not pre-registered, and are probably very selected), and many more in medicine and elsewhere.
Actually, even with many studies and a meta-analysis, you can still get blindsided by publication bias. There are plenty of psi meta-analyses showing positive effects (with studies that were not pre-registered, and are probably very selected), and many more in medicine and elsewhere.