Confirming the Efficacy/Mechanism of Family Therapy for Children With Low Weight ARFID

Inclusion Criteria: * Children meeting DSM-V criteria for ARFID * Children between the ages of 6 to 12 years old, living with their families * Medically stable for outpatient treatment according to the recommended thresholds of the American Academy of Pediatrics and the Society of Adolescent Medicine. * Not engaging in another individual or family-based psychotherapy trial during the duration of treatment sessions in the study. * Less than 4 sessions of FBT * If taking medication for co-morbid disorders, participants must be on a stable dose of medication for 8 weeks (2 months) before participating. If the participant is on a new medication at baseline, but is discontinuing the medication in order to start the study, they must have discontinued the medication before beginning treatment. * EBW between 75% and 88%. * Able to fluently speak and read English Exclusion Criteria: * Current physical, psychotic illness or other mental illness requiring hospitalization * Current psychotic illness or mental retardation 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 * Any medical complications or severe mental disorder (psychosis, low-functioning Autism) that may reduce compliance with the study procedures or require more intensive care to manage the symptoms * 4 or more sessions of FBT * Currently taking medication for co-morb…