<unk>  (SSM) is a term in the International Classification of<unk>  Disorders (ICSD) most commonly used for people who mistakenly perceive their<unk>  as wakefulness, though it has been proposed that it be applied to those who severely overestimate their<unk>  time as well ("positive"<unk> . While most<unk> ers with this condition will report not having<unk> t in the previous night at all or having<unk> t very little, clinical recordings generally show normal<unk>  patterns. Though the<unk>  patterns found in those with SSM have long been considered indistinguishable from those without, some preliminary research suggest there may be subtle differences (see Symptoms and diagnosis: Spectral analysis). Patients are otherwise generally in good health, and any illnesses—such as depression—appear to be more associated with fear of negative consequences of insomnia ("insomnia phobia") than from any actual loss of<unk> .<unk>  was adopted by the ICSD to replace two previous diagnostic terminologies: "subjective insomnia complaint without objective findings" and "subjective<unk> iness complaint without objective findings." The validity and reliability of<unk>  as a pertinent diagnosis has been questioned, with studies finding poor empirical support.
Sleep state misperception
Body image disturbance
Fear of flying
Fear of falling
Listener fatigue
Pathological lying
Fear of medical procedures
Directed attention fatigue