COGS 100 Lecture Notes - Lecture 4: Spinning Dancer, Ambiguous Image, Ponytail

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The spinning dancer: perceptual cues in reversible figure illusions. One of the first illusions that blew my mind was the spinning dancer, created by. The spinning dancer is a looping video which shows a silhouette of a dancer spinning on one foot. The illusion stems from which direction the viewer perceives her to be going. Either on her left foot spinning clockwise, or on her right leg spinning counter clockwise. My first experience with the illusion was in sixth grade while studying optical illusions for the first time in science class. The truth is that the video lacks the perceptual cues required to be sure of which way she is spinning. Due to the figure being only a silhouette, the viewer is missing the key information during the spin to tell which parts of the body are closer and further away.

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