An applied behavior analysis (ABA) therapist is a therapy professional who works with children with developmental issues. Many of the patients have a diagnosis on the autism spectrum. As an ABA therapist, your responsibilities and duties include working under the supervision of a licensed behavioral analyst to conduct specific therapies in a one-on-one setting. These techniques meet ABA protocols and aim to improve speech, behavior, and physical abilities. You also record data regarding each session to track progress and develop future therapies for the patient. ABA is sometimes used with adults as well.