Good luck with your search. Jonathon Beckwith, professor of microbiology and molecular genetics at Harvard Medical School argues that even if scientists did find differences, there is no way at this time that they could make a connection between brain structure and behavior pattterns. Brain researcher Marcel Kinsbourne suggests it's because of anti-feminist backlash. It seems that if sex differences do not exist, then they have to be invented. My kooky cousin got a Ph.D. from Yale and you couldn't pay me to go to him for counseling.
Credentials have their complexities.
Some of the finest therapists in the world don't have Ph.D.'s or even M.A.'s while some of the worst have Ivy League doctorates. Several accredited Ph.D. programs have have laryngitis about the 'p' and 'f' words, as they get queasy whenever a qualified candidate talks about our patriarchal social system and wants to be a feminist family therapist. And yes, a promising non-traditional Ph.D. program which starts out kosher could easily turn into a fraud. Credentials aren't everything. If he were doing first-rate work, I'd be more flexible about the Ph.D. provided that he admitted the problems with Columbia Pacific University.