AP PSYCHOLOGY

Detailed explanation-1: -In 1912 Wertheimer discovered the phi phenomenon, an optical illusion in which stationary objects shown in rapid succession, transcending the threshold at which they can be perceived separately, appear to move.

Detailed explanation-2: -This illusion is referred to as the stroboscopic effect. Any rapidly flashing light (some sources suggest 15 flashes per second or more) can create stroboscopic effects.

Detailed explanation-3: -1. an illusion of apparent movement seen when two lights flash on and off about 150 m apart. The light appears to move from one location to the other. The phi phenomenon is a form of beta movement.

Detailed explanation-4: -Phi Phenomenon-An illusion of movement created when two or more adjacent lights blink on & off in succession.

Detailed explanation-5: -(1) The “Phi” phenomenon. That refers to the observation that we can perceive continuous movement although only a sequence of static images is presented, this is also known as “apparent motion”. Max Wertheimer (1912) called it “phi” because he studied circular motion where the angle phi parameterised the step size.