Sleep Intervention and Quality of Life in Down Syndrome

Inclusion Criteria: * Individuals with a confirmed diagnosis of Down syndrome (DS). * English is the primary language spoken in the household. * Nonverbal mental age of at least 36 months, as determined by a baseline measure of adaptive skills. * Presence of at least one sleep disturbance occurring five or more nights per week, as reported by a caregiver. Sleep disturbances may include: Bedtime resistance; Delayed sleep onset; Problematic sleep associations; Nighttime awakenings; Early morning awakenings Exclusion Criteria: * Severe sensory or motor impairments that would interfere with participation in the intervention. * Inability to complete assessments or participate in the intervention sessions due to behavioral or medical conditions. * Participation in other concurrent behavioral or sleep interventions. * Caregiver inability or unwillingness to provide accurate reports or assist in intervention activities as needed.