[Solved] An extraneous variable is any variable that is part of a research study but not directly investigated. Voyeurism: A paraphilic disorder involving achieving sexual pleasure from watching unsuspecting individuals who are naked, in the process of disrobing, or engaging in sexual activity. Depression: A common but serious mood disorder that affects how you feel, think, and handle daily activities, characterized by persistent feelings of sadness or loss of interest. Dementia: A group of symptoms affecting memory, thinking, and social abilities severely enough to interfere with daily functioning. Confusion: A state of being bewildered or unclear in one’s mind about something, often temporary, and can be caused by various medical or psychological conditions.