I'd contact the profs you interviewed with with a standard contact letter, tell them you interviewed with them and are considering reapplying (and mention all the fantastic things you've done since last year) and ask them if they think your future research interests align. I should hope that you should be able to judge whether you should or shouldn't based on the reply.
I agree - then you can focus your energy on what limited you before.
Sorry if this has been asked before...
My situation is I have applied and been rejected 2 rounds, my first time with zero interviews, my second with three interviews. I am deciding whether to apply again, but also whether it is advisable to reapply to schools that I was rejected from AFTER the interview or if that is a lost cause.
Applying 3 times seems desperate even to me

, but I feel like I just put in too much work to give up...
(My stats are GPA- 3.92, GRE Q760 V710, senior thesis which got published, years in other labs, various volunteer/ clinical experiences)
I'd go for it again...but I say do not eliminate the schools that rejected you unless you get a definitive "sorry, it's not worth your time" from the DOT. In fact, you can ask the graduate school admissions office to carry over transcripts and some information that has not changed (if you didn't know about doing that the second time around). But submit new personal statements and letters of recs, of course (professionally ask your recommenders to revise their letters to make them stronger) or get new recommenders if you feel your previously letters were not as forthcoming & supportive as they needed to be.
You did not ask this, but think about how your application is different from that last time and tweak your personal statement. And how do you interview? Are you mature and sensible? Are you comfortable with others in the room? Can you put people at ease and engage in conversation easily? And I'm just talking about the interviewers.
Furthermore, can you imagine sitting across from a 55-year old man who stinks of poor self-care, who has schizophrenia (no active symptoms), OCD, and is an alcoholic AND providing him with psychotherapy? Can you imagine sitting across from a 23-year old woman who is diagnosed by medical staff with anxiety and severe depression, and then she admits to only you that she is repeatedly raped by an uncle and it has been ongoing since childhood AND providing her with psychotherapy? Don't worry...once in a program, you'll be trained to work with these cases, but programs want to know that the person walking through the door is mature enough to handle such situations BEFORE admissions. These are some of experiences (and many more) that you have to imagine yourself in, and step back & think about why you want to do this ugly, smelly, scary work.
If you think you have it in you, then don't give up...just work on what makes you unique and figure out (with hopefully the help of those close-by) how you can explain it your personal statements, cover letters and later interviews. Find a good book that illustrates some clinical case studies and absorb yourself in the process of being an applicant this one last time. If it doesn't work out after this round, ask to meet with the directors to see why (just as LisaLisa86 said to do beforehand) and then, reassess. I don't know many who have given it a 4th shot...so this looks like it's going to have to be the round with the golden ticket.
Unfortunately, there's so more in this admission's game than just being smart. You have to be smart, determined, mature, sensible, relaxed, composed, personable, knowledgeable (but not a know-it-all). And that's only during interviews.
Good luck!
