Tag Archives: fish cognition

Fish see illusions, just like us

Wahrnehmung_gesetzt_KontextWhich blue circle looks bigger? They're the same size. This illusion is called the "Ebbinghaus illusion" and it turns out, even fish are susceptible to this visual trickery. Some fish were trained to prefer large circles, and some to prefer small circles. Their test choice depended on the appearance of the circle in relation to a group of differently-colored, differently-sized circles.

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