The fat face thin (fft) illusion

Peter Thompson

University of York, UK

It is well-known that faces are more difficult to recognise when they’re upside-down and that sometimes we misperceived the facial expressions of upside-down faces as is shown in ‘The Margaret Thatcher illusion’.
Now I give you ‘The Fat Face Thin illusion’. Compare the upside-down face on the left of the lower figure with the upright face on the right. The upside-down version looks much thinner, – altogether a longer shaped face than the upright version. Of course the pictures are identical. This illusion illustrates the internal features of the face, (eyes, nose, mouth) can distort our perception of face shape.

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