The Society currently consists of approximately 2,000 members and 650 associate members. To be eligible for membership, a person must hold the Ph.D. degree or equivalent, and must have published significant psychological research beyond the doctoral dissertation.

Typically a successful candidate will be at least two years post-Ph.D. and will have at least four research publications in high-quality refereed journals after the date of the Ph.D. Furthermore, at least two of the publications will be first-authored and at least three will be based on research subsequent to the Ph.D.

Candidates for membership must be nominated by a member of the Society and elected by the Membership Committee of the Governing Board. These selections are made twice a year. To be eligible for Associate membership, a person must hold the Ph.D. degree or equivalent and must be nominated by a member of the Society