Scott Alexander, curated
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Diametrical Model Of Autism And Schizophrenia

Quality
66
Strong
Claude Shift
48
Moderate
RWI
2
of 10

Summary

A clear explainer of the Crespi/Badcock/Del Giudice 'diametrical model': autism and schizophrenia as failure modes of opposite ends of a spectrum from overly-mechanistic (autism) to overly-mentalistic (schizotypy/schizophrenia) cognition. Explains the opposing genetics/anatomy (corpus callosum size, smoking rates, rubber-hand illusion, self-other boundaries), the high-functioning schizotypy/autism poles, and how high mutational load pushes either pole into disorder (explaining why the two conditions are both opposite AND similar). Cites PCA and first-degree-relative evidence; notes the John Nash exception (schizophrenic game-theorist) with characteristic honesty about the thin evidence.

Why this score

Quality 66 · Strong. 66 — low Strong. A clear, engaging, well-organized exposition of a genuinely interesting theory with honest skepticism ('not great evidence for it'), but a summary of others' model with modest original contribution. Firm low-Strong.

Claude’s paradigm shift 48 · Moderate. 48 — Moderate. Reviews an existing theory (Crespi/Badcock/Del Giudice); the value is clear exposition, not novelty.

Real-world impact 2 · Minor. 2 — minor/within-blog. Niche psychiatry/psychology explainer; no material reach.