Modulation of Sleep Perception Through Auditory Closed-loop Stimulation of Brain Oscillatory Activity

Inclusion Criteria: * For patients: diagnosis of ID according to DSM 5 criteria; for controls: mentally and somatically healthy * Age 18 to 65 years * Written informed consent Exclusion Criteria: * Relevant current or past serious medical disorder, including but not limited to cardiac arrhythmia, diabetes mellitus, and chronic pain conditions. * Neurological conditions including epilepsy, history of brain injury, encephalitis or any organic brain syndrome * Current or past mental disorders (life time prevalence), e.g. depressive disorder, attention deficit disorder, psychotic disorders, anxiety disorder, posttraumatic stress disorder * Sleep disorders (except ID for patients), including movement-related sleep disorders (PLMS index with arousal \> 5) or breathing-related sleep disorders (AHI \> 15) * Intake of CNS active medication (except appropriate thyroid hormone substitution) * Current or past substance abuse or dependency * Smoking \> 5 cigarettes per day * Excessive caffeine consumption (\> 500 mg or 5 cups coffee per day) * Irregular sleep schedules resulting from shift work, travelling or personal habits, defined as a sleep/wake time deviation \> 4 hours in the weekly routine or as a habitual total sleep time \< 4.5 hours or \> 10 hours per night * Known pregnancy