My Wife and My Mother-in-Law

"My Wife and My Mother-in-Law" is a famous ambiguous image, which can be perceived either as a young woman or an old woman (the "wife" and the "mother-in-law", respectively).

[1] American cartoonist William Ely Hill (1887–1962) published "My Wife and My Mother-in-Law" in Puck, an American humour magazine, on 6 November 1915, with the caption "They are both in this picture — Find them".

[2] However, the oldest known form of this image is an 1888 German postcard.

[3] In 1930, Edwin Boring introduced the figure to psychologists in a paper titled "A new ambiguous figure", and it has since appeared in textbooks and experimental studies.

And then in 1961, Jack Botwinick introduced a new figure with a masculine motif, "Husband and Father-in-Law", which complements Hill's figure.