Brief Trial of ACT-i for Adults With Chronic Insomnia

Inclusion Criteria: * clinical/ subclinical diagnosis of chronic insomnia either already diagnosed by a professional, or identified with SCISD-R by our team of clinicians * age over 18 and older, but not over 59 years old; * minimal/ mild symptomatology of depression (scores ≤ 9 on PHQ-9) and/ or anxiety (scores ≤ 9 on GAD-7) or as diagnosed with SCID-5-CV; Exclusion Criteria: * diagnosed with a neurological degenerative disorder, or any moderate/ severe psychiatric disorder; * diagnosed with other sleep disorder (e.g., sleep apnea, restless legs/ periodic limb movements, circadian-based sleep disorder); * diagnosed with cognitive impairments; * unable to understand Romanian; * unable to attend to online-sessions (e.g., no laptop, microphone, camera);