Disentangling the Role of Depression in Hypersomnia

This study is looking at the relationship between depression and hypersomnia — a condition where people sleep excessively and struggle to stay awake during the day. Researchers want to understand whether the sleepiness in some patients is caused primarily by depression or by a separate underlying sleep disorder. **You may be eligible if...** - You are between 21 and 55 years old - You meet the clinical criteria for either idiopathic hypersomnia (excessive sleepiness without a known cause) or hypersomnia associated with a psychiatric disorder - You can read and speak English **You may NOT be eligible if...** - You have untreated obstructive sleep apnea (a sleep disorder where breathing repeatedly stops) - You meet criteria for narcolepsy - You are unable or unwilling to provide consent - You have other medical conditions that could explain your excessive sleepiness (like thyroid problems or medication side effects) - You are pregnant Talk to your doctor to see if this trial is right for you.