A meta-analysis of the survival-processing advantage in memory

Area of Science:

• Cognitive Psychology
• Memory Research
• Evolutionary Psychology

Background:

• The survival-processing advantage is a well-documented phenomenon in memory research.
• This advantage occurs when individuals process information related to survival, leading to enhanced recall.
• Previous studies have reported varying effect sizes, necessitating a comprehensive review.

Purpose of the Study:

• To conduct a meta-analysis of the survival-processing advantage literature.
• To estimate a bias-corrected effect size for the survival-processing advantage.
• To control for small-study effects and publication bias.

Main Methods:

• A meta-analysis was performed on existing studies investigating the survival-processing advantage.
• Various statistical techniques were employed, including traditional meta-analysis, test of excess significance, p-curve, p-uniform, trim and fill, PET-PEESE, and selection models.
• Effect sizes were corrected for potential bias and selective reporting.

Main Results:

• Bias-corrected average effect sizes for survival processing ranged from η² = .06 to .09 for between-subjects designs.
• For within-subjects designs, corrected effect sizes ranged from η² = .15 to .18.
• The study found medium to large survival-processing effects, with bias-correction methods yielding lower estimates than traditional approaches.

Conclusions:

• The survival-processing advantage is a robust effect, generally yielding medium to large effect sizes.
• Bias-correcting techniques are crucial for accurately estimating the true effect size by accounting for small-study effects and selective reporting.
• Researchers should anticipate significant memory benefits when information is processed for survival relevance.