Confirming the Effectiveness of Online Guided Self-Help Family-Based Treatment for Adolescent Anorexia Nervosa

Inclusion Criteria:

   1. Participants are 12-18 years of age

   2. Participants live with a family (some families may contain only one parent)

   3. Family members fluently speak and read English and have access to a computer with
   internet

   4. Participants meet DSM-5 criteria for AN (both subtypes)

   5. EBW above 75%

   6. Participants are medically stable for outpatient treatment according to the
   recommended thresholds of the American Academy of Pediatrics and the Society of
   Adolescent Medicine

   7. Participants are not engaged in another individual or family-based psychotherapy trial
   during the duration of treatment sessions in the study.

   8. Medications for comorbid psychiatric disorders are OK; randomization will balance
   groups through tracking.

Exclusion Criteria:

Current psychotic illness or intellectual disability or other mental illnesses that would
prohibit the use of psychotherapy; current dependence on drugs or alcohol; physical
conditions (e.g. diabetes mellitus, pregnancy) known to influence eating or weight;
previous FBT; and inability of the participant and/or family to speak and understand
English.