William Mitchell

Psychological Consultant and group leader for Personal Growth, Threshold Program

William Mitchell is a psychologist who provides consultation to faculty and staff of the Threshold Program at Lesley University. In that role he conducts weekly clinical meetings with key administrators, residential staff, faculty in the psychosocial strand of Threshold’s curriculum, the Director of Health Services for Lesley University and counseling and social work interns. He also teaches a course, Personal Growth, a psycho-educational class devoted to enhancing the psychological well-being and social skills of all first and second year students. He has served in these roles since the inception of Threshold in 1982.

He is also responsible for coordinating the recruitment and supervision of counseling and expressive therapies interns. He is contracted for these services from Boston Children's Hospital where he is Senior Psychologist in the Learning Disabilities Program and Assistant Professor at Harvard Medical School. 

William holds a BA from the University of North Carolina, Chapel Hill, and an Ed.M and Ed.D from Harvard University. Ed.D. Harvard University, 1979 


  • Mitchell WM, Heaton FC, Little RW, Faust RG. Comparative Aspects of sugar penetration into blood platelets. Comp Biochem Physiol 1970;32:813-15.
  • Mitchell WM, Cook KV, Opitz JM, Reynolds JF. Social skills training of Prader-Willi staff. Am J Med Genet 1987;28:907-13.
  • Wharton R, Mitchell WM. When a family member has Prader-Willi Syndrome. Medical Aspects of Human Sexuality 1989;23(3):114-124.
  • Weiler MD, Bellinger D, Simmons E, Rappaport L, Urion DK, Mitchell W, Bassett N, Burke P, Marmor J, Waber DP. Reliability and validity of a DSM-IV based ADHD screener. Child Neuropsychology 2000;6:3-23.
  • Sorensen LG, Forbes PW, Bernstein JH, Weiler MD, Mitchell WM, Waber DP. Psychosocial functioning of learning impeded children over a two-year period: risk, resilience, and adaptation. Learning Disabilities Research and Practice 2003;18:10-24.
  • Mitchell W; Rizzo SJ. The adolescent with special needs. In:  Mirkin MP; Koman S, editors. The handbook of adolescents in family therapy. New York: Gardner Press; 1985. p. 329-342.
  • Mitchell W. Social skills training for Prader-Willi Syndrome. In: Alexander RC; Greenswag LR, editors. Management of Prader-Willi Syndrome. New York: Springer-Verlag; 1988. p. 165-170.
  • Mitchell, William M, Jr.  Fathers of children with Down Syndrome [dissertation].  Cambridge (MA):  Harvard University Graduate School of Education; 1979. 170 p.


  • 1980 A Treatment Program for Self-Injurious Behavior/Lecture and Video. American Association on Mental Deficiency, San Francisco
  • 1986 Social Skills Training/Lecture. Prader-Willi Syndrome Association, National Conference, Sacramento CA
  • 1987 Families of Individuals with Prader-Willi Syndrome/Lecture. Prader-Willi Syndrome Association, National Conference, Houston TX
  • 1987 Siblings of Prader-Willi Syndrome Persons/ Lecture & Colloquium. Prader-Willi Syndrome Association, National Conference, Houston TX
  • 1999 The Other Half of the Brain: Nonverbal Learning Disorders. Two Lectures
  • 1999 From Cortex to Classroom. Learning Disabilities Program, Children's Hospital Boston
  • 2000 The Other Half of the Brain: NLD in Middle & High School. Two Lectures
  • 2000 From Cortex to Classroom (with Seligsohn, K.). Learning Disabilities Program, Westin Hotel, Waltham MA
  • 2000 Emotional Disorders and Learning Disabilities. Single Lecture
  • 2000 From Adolescence to Adulthood/Lecture. Learning Disabilities Association, National Meeting, Reno, NV
  • 2001 A Program for Young Adults with Nonverbal Learning Disorders/Lecture. Learning Disabilities Association, National Meeting, New York City
  • 2001 Emotional Disorders and Learning Disabilities/Lecture. Learning Disabilities Association, National Meeting, New York City
  • 2002 The Other Half of the Brain: Nonverbal Learning Disorders and Schooling/Lecture. Lesley University, Cambridge MA
  • 2003 Neurofibromatosis and LD/Lecture. Lesley University, Cambridge, MA
  • 2003 WAIS-III Basics/Lecture. Lesley University, Cambridge MA
  • 2008 Promoting Self-Esteem & Motivation Among Young Adults with LD/Lecture. Lesley University, Cambridge, MA