1. Behavioral tests are used to evaluate hearing in infants and young children, including behavioral observation audiometry for infants under 6 months and condition orientation reflex audiometry (CORA) for children 6 months to 1 year old. 2. CORA uses operant conditioning to teach the child to orient towards a sound source to receive a visual reinforcement from a lighted toy. 3. Visual reinforcement audiometry (VRA) and tangible reinforcement operant conditioning audiometry (TROCA) build on CORA principles to test older children using reinforcement strategies. 4. Conditioned play audiometry (CPA) teaches children ages 2-4 to perform tasks after hearing tones to make the