Is there selective retroactive memory enhancement in humans?: a meta-analysis

Area of Science:

• Cognitive Psychology
• Neuroscience

Background:

• Memory systems prioritize motivationally relevant information.
• Information initially irrelevant can later gain significance.
• The capacity for retroactive memory enhancement (RME) is debated.

Purpose of the Study:

• To investigate the reliability of selective RME.
• To synthesize evidence from multiple RME experiments.
• To address conflicting findings in recent RME research.

Main Methods:

• Conducted a meta-analysis of 14 experiments on RME.
• Employed classical meta-analysis and robust Bayesian meta-analysis.
• Assessed for small-study bias and its impact on effect sizes.

Main Results:

• Classical meta-analysis suggested a small selective RME effect (d = 0.16).
• Bayesian meta-analysis, accounting for bias, supported the null hypothesis (d = 0.02, BF01 = 3.03).
• Strong evidence for small-study bias was detected (BF10 = 11.39).

Conclusions:

• The reliability of selective retroactive memory enhancement is questionable.
• Small-study effects significantly bias findings in RME research.
• Further research is needed to clarify the conditions under which RME may occur.