Clinical Research Directory

Inclusion Criteria: * Children with normal hearing will have hearing thresholds from 0.25 - 8 kHz ≤15 dB HL in both ears with no history of neurodevelopmental, communication, or sensory disorders. * Children with unilateral hearing loss will have hearing thresholds that meet the criterion for CNH in the better ear and three-frequency (.5, 1, \& 2 kHz) pure-tone average ≥ 20 - \<70 dB HL or two or more hearing thresholds ≥ 20 - \< 70 dB HL from 2-8 kHz in the poorer ear. Hearing loss can be conductive, mixed, or sensorineural. Exclusion Criteria: * Children with unilateral hearing loss who have a cochlear implant, rerouting device, or an implanted bone conduction device will be excluded due to neuroimaging restrictions with implantable devices. * For neuroimaging experiments only, there are additional exclusion criteria. Participants will be excluded from MEG and MRI experiments if they have 1) Current use of the following medications: psychotropic medications or other medications with significant CNS effects (e.g., antidepressants, antipsychotics, anticonvulsants, alpha-agonists, adrenergic blockers, lithium, and sedating antihistamines), or other excluded medication, 2) current major psychiatric diagnosis, 3) current substance abuse or substance dependence at any time, 4) diagnosis of a known neurological disorder or any major medical illness or injury impacting neurological/psychiatric function (e.g., diabetes, epilepsy, cerebral palsy, HIV, traumatic brain injury, significant environmental/toxic injury, neurodegenerative disorder, past meningitis/encephalitis) 5) general medical conditions: any major medical conditions that would interfere with involvement in the study or may affect CNS function as judged by the investigative team or 6) presence of any ferrous metal implant, including orthodonture or pacemaker, which may interfere with the MEG data acquisition and/or be an MRI safety concern.