In general, of course, we want large effect sizes in our practice, and we want clinically meaningful effects. (psychotherapynetworker.org)
Studies that used instruments to measure attachment, including parental control items, revealed larger effect sizes. (link.springer.com)
Outcomes that were based on parent reporting showed larger effect sizes for targeted approaches (treatment studies d = 0.50) than universal approaches (indicated sample d = 0.20, selective d = 0.13). (trialsjournal.biomedcentral.com)