HoldsUp

Ashley Mason

Osher Center for Integrative Medicine at UCSF

Ashley Mason is a clinical psychologist and the director of the Sleep, Eating, and Affect Laboratory at the Osher Center for Integrative Medicine at UCSF. Her research focuses on non-pharmacological treatments for depression, insomnia, and eating behaviors, including cognitive behavioral therapy and whole-body hyperthermia. Additionally, her published work examines the application of wearable device metrics to analyze sleep, body temperature dynamics, and physiological health.

31 claims checked on air: 2 context 1 overstated 27 supported 1 unverified

What they said on air - overstated

2 citing their own research

0:47:06overstatedmoderateDr. Ashley Mason on Sauna Use for Depression, Conquering Ins

Population chronotypes are roughly distributed as one-third morning types, one-third evening types, and one-third intermediate types.

"I think the data are that it's kind of roughly a third, a third, a third-ish: a third of people are morning people, a third-ish of people are evening people, and then a third-ish are somewhere in the middle." (said at 0:47:06)

Population chronotypes are continuously distributed along a normal (near-Gaussian) curve rather than divided into equal thirds. Consequently, intermediate (neither morning nor evening) types make up the largest proportion of the population—typically around 50% or more depending on the scoring criteria and age group—while clear morning and evening types represent smaller proportions (often ~10–25% each under modernized cutoffs, or heavily skewed toward morning types with age under traditional Horne-Östberg criteria).

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