Psychological assessment is a common method used to evaluate for the presence of psychological, emotional, intellectual, and learning processes that may be impacting a person's ability to function adequately. These services incorporate psychological, educational, and forensic evaluations and are available to children and adults for a variety of presenting problems including attention-deficit / hyperactivity disorder (ADHD), learning disabilities, autism and pervasive developmental disorders, vocational issues, behavioral difficulties, intelligence and gifted evaluations, personality testing, treatment amenability, various legal competencies, and parenting or child custody issues.