The Behavior Rating Inventory of Executive Function (BRIEF) is an assessment of executive function behaviors at home and at school for children and adolescents ages 5–18. It was originally developed by Gerard Gioia, Ph.D., Peter Isquith, Ph.D., Steven Guy, Ph.D., and Lauren Kenworthy, Ph.D. The Behavior Rating Inventory of Executive Function (BRIEF) is an assessment of executive function behaviors at home and at school for children and adolescents ages 5–18. It was originally developed by Gerard Gioia, Ph.D., Peter Isquith, Ph.D., Steven Guy, Ph.D., and Lauren Kenworthy, Ph.D.