ummm not sure but last I knew we were not supposed to promote other forum sites with the purpose of trying to get other members to go there.
from the community guideline page...

https://forums.psychcentral.com/rule...uidelines.html
Soliciting others to join another online community

not sure if your request for us to give you names of other forum sites like psych central falls into that category, but it might, so you might want to contact a moderator....

another suggestion...you might want to google those topics you are interested in, that will probably give you a whole mess of results of forum sites on any topic/ subject out there with out me breaking the solicitation rule and posting any links or promoting other websites forums here.