A "duck-or-rabbit" optical illusion first used more than 100 years ago by a psychologist has popped up online and is captivating many on the Internet.
The drawing making the rounds on social media was used by Joseph Jastrow back in 1899 to demonstrate that perception is a mental activity and not just what a person sees, according to
The Independent.
During Easter time, most people are more likely to see a rabbit and in October a duck.
"Depending on whether an observer sees a duck or a rabbit first and how fast it sees the other is an indicator of how creative you are, and how fast your brain works," noted the
Daily Mail. "(Jastrow's) research suggested that more creative people were able to switch between images of the two animals more quickly than other people."
"Participants who found it very easy to flip between rabbit and duck came up with an average of almost five novel uses for an everyday item. Those who couldn't flip between rabbit and duck at all came up with less than two novel uses."
The illusion amused the Twittersphere.
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