regressionist

Etymology

From regression + -ist.

regressionist means one who promotes or follows regressionism. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

One who promotes or follows regressionism.“This politician is a regressionist who disregards what people care about now.”
One who travels back in time.“She, too, was a past-life regressionist. I asked, “Do you remember if you had a lifetime in connection with Nazi Germany?” She replied, “Oh, I thought you knew. I was a prison warden at Auschwitz. […]”
One who carries out regressions, inducing a patient to act out behaviour typical of an earlier developmental stage.