👉 In the field of psychology, "photoactivity" refers to a phenomenon that occurs when individuals are exposed to a specific stimulus and experience an increased level of arousal or excitement. This is often described as a heightened emotional response associated with exposure to stimuli that trigger positive associations in the brain. The term was coined by psychologist J. W. B. Pines in 1960, and it has since been widely used in various fields such as education, research on human behavior, and psychology.
