HackerNews Summary (2023-06-07 03AM)

Source: Beware the Man of Many Studies

Summary
Trusting a singular study over a whole literature may be better due to the issue of publication bias, where some results are more likely to be published than others, often because of filtering for significance. This results in larger effect sizes in many literatures, making it difficult to estimate the true effect, and correction methods like the trim-and-fill method are necessary.

Facts

💡Publication bias occurs when some results are systematically more likely to be published than others, often due to filtering for significance.

💡The publication bias pattern results in larger effect sizes in many literatures, making it difficult to estimate the true effect.

💡Correction methods like the trim-and-fill method can be used to address this bias by adding datapoints that mirror the observed asymmetry in the plot on the other side of the meta-analytic estimate.

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