Unlearning implicit social biases during sleep: A failure to replicate.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Social Psychology

Background:

• A 2015 study proposed using targeted memory reactivation during sleep to reduce implicit biases.
• This method aimed to strengthen counter-stereotype memories by replaying associated cues during a nap.
• Implicit biases have significant real-world consequences, making bias reduction strategies important.

Purpose of the Study:

• To replicate the findings of Hu et al. (2015) on reducing implicit bias through sleep-based cueing.
• To investigate the effectiveness of targeted memory reactivation for reducing racial and gender biases.
• To assess the durability of any potential bias reduction effects.

Main Methods:

• Replicated a targeted memory reactivation procedure during a 90-minute nap in 31 college students.
• Used auditory cues associated with counter-stereotype training during sleep.
• Measured implicit bias immediately after the nap and one week later.

Main Results:

• No significant effect of cueing during sleep on implicit bias was detected.
• Implicit bias was non-significantly higher for cued stimuli compared to uncued stimuli.
• The replication's statistical power and confidence intervals suggest the original finding was likely not a noisy estimate.

Conclusions:

• The replication failed to support the efficacy of cueing during sleep for reducing implicit bias.
• The results challenge the original findings and reduce confidence in this sleep-based intervention.
• Further research is needed to understand the discrepancy and the potential for sleep interventions in bias reduction.