A replication of a 2023 neuroscience study on brain entrainment and learning found that the original effect likely doesn't exist, revealing how the study obscured key issues through statistical averaging and highlighting how AI tools are democratizing scientific scrutiny. Longer summary

Sasha Putilin received an ACX grant to replicate a 2023 study claiming that flickering lights synchronized to individual brain rhythms could boost learning speed threefold. The $32,000 replication with 12 participants (versus 80 in the original) found no such effect. Upon examining the original data more closely, Putilin discovered the apparent effect was driven entirely by a few participants with large negative learning rates (getting worse over time) who happened to all be in one experimental group. The original study had obscured this pattern by presenting averaged data rather than individual results. Putilin argues this exemplifies 'cargo-cult statistics' where researchers mechanically apply statistical rituals without critically examining underlying data. The post concludes by suggesting AI tools are democratizing meta-science, enabling anyone to audit published research that previously required expert-level effort. Shorter summary

Daniel Böttger proposes a new theory of consciousness as recursive reflections of neural oscillations, explaining qualia and suggesting experimental tests. Longer summary

This guest post by Daniel Böttger proposes a new theory of consciousness, describing it as recursive reflections of neural oscillations. The theory posits that qualia arise from the internal processing of information within oscillating neural patterns, which can reflect on themselves. The post explains how this theory accounts for various characteristics of qualia and consciousness, and suggests ways to test the theory using EEG source analysis. Shorter summary

Scott provides updates and reader responses to his previous 'Quests and Requests' article, addressing the status and potential of each proposed project. Longer summary

This is a follow-up post to Scott's 'Quests and Requests' article, addressing the current status and responses to each of the eight projects proposed. Scott provides updates, shares relevant comments and offers from readers, and gives his thoughts on the progress and potential of each quest. He also clarifies his intentions and expectations for these projects, encouraging self-organization among interested parties. Shorter summary

Scott reviews 'Rhythms Of The Brain', exploring the nature and potential significance of brain waves in neuroscience and consciousness. Longer summary

Scott reviews 'Rhythms Of The Brain' by Gyorgy Buzsaki, exploring the nature and potential significance of brain waves. He discusses why brains produce oscillations, the characteristics of these waves, their possible functions, and speculates on their relationship to consciousness and spiritual experiences. The review concludes with thoughts on how the absence of brain-wave equivalents in AI might affect their development of consciousness or selfhood. Shorter summary

Scott Alexander critiques a study claiming cash payments to poor mothers increased infant brain function, highlighting statistical and methodological issues that undermine its positive conclusions. Longer summary

Scott Alexander critiques a recent study claiming that cash payments to low-income mothers increased brain function in babies. He points out several issues with the study, including the loss of statistical significance after adjusting for multiple comparisons, potential artifacts in EEG data visualization, and deviations from pre-registered analysis plans. He also discusses the broader context of research on poverty and cognition, noting the difficulty in finding shared environmental effects and the tendency for studies in this field to be flawed or overhyped. Scott concludes that while the study doesn't prove cash grants don't affect children's EEGs, it essentially shows no effect and should not have been reported as an unqualified positive result. Shorter summary