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Landy concluded Wilson suffered from a schizoid personality with manic depressive features — introverted, painfully shy, unable to show emotion.

"I have bipolar type 2 and tend to go into depressive episodes, if it's a really bad episode it leads to me not being aware of what I'm doing," she says.

His 1967 paper, titled “The Biochemistry of Affective Disorders,” reviewed studies of reserpine, iproniazid, and other recently discovered drugs, and proposed that low levels of a different neurotransmitter, serotonin, could underlie depressive illness.

After four weeks, bot users showed significant reductions in their symptoms – including a 51% reduction in depressive symptoms - and reported a level of trust and collaboration akin to a human therapist.

Messy, depressive and defiant, it even appears to have told the hair team to throw away their combs.