Arthur Zajonc (born 1949), professor of physics at Amherst College in Massachusetts
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Robert Zajonc (1923–2008), Polish-born American social psychologist
Zajonc was married to American social psychologist Hazel Rose Markus, known for her contributions to cultural psychology.
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Robert Boleslaw Zajonc, an only child, was born in Łódź, Poland on November 23, 1923.