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Mary Claire Haver, MD@drmaryclaireInstagram

Comment POD for the full conversation with Dr. Sue Varma (@doctorsuevarma) on unPAUSED. What if optimism

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what it claims

Optimism is not solely an innate character trait (approximately 25% of which is determined by genetics); it is a skill that can be cultivated by developing social connections, seeking help, and learning techniques to identify and challenge pessimistic thought patterns.

holds up

Scientific literature confirms that optimism is a complex trait influenced by an interaction between genetics and the environment.

noli's read

Scientific literature confirms that optimism is a complex trait influenced by an interaction between genetics and the environment. Twin studies (notably a meta-analysis published in Psychological Bulletin) estimate the heritability of an optimistic temperament at around 25-30%, which corroborates the figure provided. The role of the OXTR (oxytocin receptor) gene in emotional regulation and sociability is an active subject in neuroscience (observational studies in PNAS), although linking it directly to 'optimism' is a simplification of a vast biological mechanism. The suggested behavioral approach—cognitive restructuring and maintaining social ties—is the pillar of cognitive behavioral therapy (CBT), the efficacy of which in improving well-being is widely demonstrated by numerous randomized controlled trials (RCT). The discourse remains cautious by avoiding 'magical thinking' and focuses on mental training, which is scientifically supported as a form of behavioral neuroplasticity.

the sources

No named source held this one up — that absence is part of the verdict.

Claimed by Mary Claire Haver, MD. Noli grades the claim, never the person.

Decoded by Noli · July 18, 2026 · the original post

Mary Claire Haver, MD in the Register58 claims graded · solidity 89/100See their record →

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