For this study, the investigators propose to conduct an online study of PwPD (proposing a total of 60 participants) to examine the relations among variables that may relate to perception in PD. Those PwPD who express interest will be sent a link to an online survey (Qualtrics). The investigators will collect demographic and health information, followed by questionnaires assessing unusual perceptual experiences, mood, motivation, sleep, fatigue and quality of life. The survey should take roughly 45 minutes to an hour to complete.~Compensation: A $20 Amazon gift card will be offered to those who complete the survey all the way through with good effort.
The investigators plan to examine the relation of perceptual variables-basic vision, unusual perceptual experiences(including but not limited to visual hallucinations)-to relevant functional variables such as cognition, mood, and alertness/sleepiness in an online sample of persons with Parkinson's disease (PwPD). It is hypothesized that unusual perceptual experiences will relate significantly to the selected variables. Participants do not need to experience visual hallucinations to be able to participate in this study. This is an observational study only, and not an interventional study.