Effect size index

Effect size index is a statistical measure that quantifies the strength or magnitude of a relationship or difference between groups, beyond just noting if it’s significant. It helps us understand how meaningful the findings are in real-world terms. For example, a small effect size indicates a subtle difference, while a large effect size reflects a more substantial and impactful difference. This measure allows researchers and decision-makers to compare results across studies and assess the practical importance of their findings, rather than relying solely on whether differences are statistically "significant."