Thatcher Effect
The Thatcher effect or Thatcher illusion is a phenomenon where it becomes difficult to detect local feature changes in an upside down face, despite identical changes being obvious in an upright face. It is named after British former Prime Minister Margaret Thatcher on whose photograph the effect has been most famously demonstrated.
The J-Walk Blog: Flipped Photo
http://j-walkblog.com/images2/madonnasmile.gif
Al
The Thatcher effect or Thatcher illusion is a phenomenon where it becomes difficult to detect local feature changes in an upside down face, despite identical changes being obvious in an upright face. It is named after British former Prime Minister Margaret Thatcher on whose photograph the effect has been most famously demonstrated.
The J-Walk Blog: Flipped Photo
http://j-walkblog.com/images2/madonnasmile.gif
Al
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