“…The cognitive and behavioral factors specific to PD are directly associated with subjective and objective sleep disturbances (Simor & Horváth, 2013). For example, emotional lability, an inconsistent sense of self, difficulties with reality testing, increased nightmare frequency, specific circadian profiles (including phase delay and rest‐activity misalignment), and dissociative experiences, among others, are likely to mean that treating sleep disturbance in the context of PD requires a different approach to individuals with disturbed sleep but without personality difficulty (Jenkins et al, 2022; McGowan & Saunders, 2021; Rezaie et al, 2020). Moreover, “sleep‐state misperception,” a significant discrepancy between subjective sleep quality and objective quality, is thought to be common for people with PD (Bastien et al, 2008; Philipsen et al, 2005).…”