Thomas & Chess on Behavioral Individuality

Alexander Thomas and Stella Chess discuss temperament qualities in children.

Contact Behavioral-Developmental Initiatives

Behavioral-Developmental Initiatives is a project started in 1996 to promote awareness and understanding of behavioral individuality among the parenting and professional public. There are several contact points, depending on the purpose. Use the list below to email, telephone or correspond regarding questions or issues that may arise.

Email contacts:

B-DI Website


Customer Service


Written correspondence: B-DI 14636 North 55th Street Scottsdale, AZ 85254