Welcome to the Albert Ellis Institute (AEI), a world-renowned psychotherapy training Institute established in 1959. AEI is committed to promoting emotional well-being through the research and application of effective, short-term therapy with long-term results. Pre-Doctoral Externships are part-time, one- or two-year appointments in which candidates receive in-depth training in Rational Emotive Behavior Therapy, serve as therapists in the Institute's clinic, co-lead groups and workshops, receive 3 hours of individual and group supervision a week, and participate in ongoing research.