Clinical Research Directory

Inclusion Criteria: * Youth aged between 15-24 years (as defined by WHO); * Written informed consent of participation into the study is given by youth and his/her parents if under 18 years old; In addition, individual assent will also be obtained for subjects under age 18 years old; * Have subclinical insomnia symptoms (at least once a month but less than 3 times/week in the past one month); * At least one of the biological parents with current or lifetime history of insomnia disorder as defined by DSM-V diagnostic criteria. Exclusion Criteria: * A current or past history of neuropsychiatric disorder(s); * A prominent medical condition or taking medication with potential side effects that may influence sleep quantity and quality; * Having a diagnosed sleep disorder that may potentially contribute to the disruption of sleep quantity and quality as ascertained by both Structured Diagnostic Interview for Sleep patterns and Disorders (DISP) such as insomnia, delayed sleep phase and narcolepsy, restless leg syndrome; * Having a clinically significant suicidality (presence of suicidal ideation with a plan or an attempt); * Currently receiving any structured psychotherapy; * With hearing or speech deficit; * Trans-meridian flight in the past 3 months and during the study.