He was interested in the Gestalt laws of motion perception in vision.
[1][2] He helped develop the rigidity assumption which posits that proximal stimuli that can be perceived as rigid objects are generally perceived as such.
Johansson received his Ph.D. from the Stockholm University College in 1950, on the thesis Configurations in event perception.
In 1970, he was elected a member of the Royal Swedish Academy of Engineering Sciences.
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