It depends. If the original study was published only because it had a positive result (significance filter, usually true), we expect the effect to be smaller in

It depends. If the original study was published only because it had a positive result (significance filter, usually true), we expect the effect to be smaller in a larger replication. It's called Type M error, with M for magnitude. And, yes, large scale replications typically show smaller effects or no effects. See this paper for details: https://journals.sagepub.com/doi/full/10.1177/1745691614551642 https://journals.sagepub.com/doi/full/10.1177/17456916145516...