Academic journal article Journal of College Science Teaching

Parrot "Understands" Zero

Academic journal article Journal of College Science Teaching

Parrot "Understands" Zero

Article excerpt

The walnut sized brain of the African grey parrot may actually be capable of comprehending abstract mathematical concepts. The bird seems to understand a numerical concept akin to zero--an abstract notion that humans don't typically understand until they are three or four years old. Alex, the 28-year-old parrot who lives in a Brandeis University lab run by cognitive scientist Dr. Irene Pepperberg, spontaneously and correctly used the label "none" during a testing session of his counting skills to describe an absence of a numerical quantity on a tray. This discovery prompted a series of trials in which Alex consistently demonstrated the ability to identify zero quantity by saying the label "none."

The findings, published in The Journal of Comparative Psychology, add to a growing body of scientific evidence that the avian brain, though quite different from the mammalian cortex, is capable of higher cognitive processing than previously thought. The use of "zero" to label a null set has not always been obvious even in human cultures, which in many cases lacked a formal term for zero as recently as the late Middle Ages. …

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