The house across the street is decorated with a lot of lights for a party.The lights along the roof turn on and off,one at a time,so that it looks as if a light is moving across the edge of the roof.What is the Gestalt term for this illusion

Question

Quizplus · Accepted Answer

The phi phenomenon occurs when lights turned on and off in a sequence giving an illusion of movement. This fits well with the scenario described in the question where it appears as if a light is moving across the edge of the roof due to the sequence of lights turning on and off. Choice A - continuity refers to the tendency to perceive smooth and continuous patterns. Choice C - Pragnanz (also known as the law of simplicity) states that people tend to organize stimuli in the simplest way possible. Choice D - figure-ground reversal refers to the reversal of the perceived foreground and background depending on the observer's focus. None of these concepts apply to the scenario described in the question.

The House Across the Street Is Decorated with a Lot