= Decline effect
{wiki=Decline_effect}
The "decline effect" refers to a phenomenon observed in psychological and other scientific research where the size of an effect diminishes over time, typically when studies are replicated. This decline in effect size can be seen in various domains, including psychology, medicine, and other social sciences. One classic example of the decline effect is seen in studies related to the efficacy of certain psychological interventions, where initial studies may show a strong positive effect, but subsequent replications produce weaker outcomes.
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