Auditory EEG and Behavioral Assessments in Individuals With Rett Syndrome

Rett Syndrome Participants: Inclusion Criteria: * Have a clinical diagnosis of classic Rett syndrome * Have a pathogenic MECP2 genetic variant confirmed via genetic testing * Are past the clinical regression stage * Are within the eligible age range for the study (2 years or older) * Are able to tolerate the noninvasive EEG recording * Parent or caregiver is willing and able to provide parental permission and complete questionnaires and interviews Exclusion Criteria: * Experiences hearing impairment or hearing loss * Presence of medical conditions that would prevent safe participation in EEG recording * Inability to tolerate EEG procedures * Any condition that in the opinion of the investigator would interfere with study participation or data quality Controls Inclusion Criteria: * Neurologically healthy individuals ages 2 years or older * Are able to tolerate the noninvasive EEG recording Exclusion Criteria: * Experiences hearing impairment or hearing loss * Medical history of genetic, neurological, or psychiatric disorders * History of special education services * Inability to tolerate EEG procedures * Any condition that in the opinion of the investigator would interfere with study participation or data quality