Björnar kan räkna

[grodanbolle]

http://di.se/Artiklar/2012/6/18/270383/KLAR-HOGER-Forskare-Bjornar-kan-rakna/

Jag får en bild av en björn sitta där "ett två tre på det fjärde skall det ske"

 

[KLAGER]

We investigated the numerical abilities of three American black bears, Ursus Americanus, by presenting discrimination tasks on a touch-screen computer. One bear chose the larger of two arrays of dot stimuli, while two bears chose the smaller array of dots. On some trials, the relative number of dots was congruent with the relative total area of the two arrays. On other trials, number of dots was incongruent with area. All of the bears were above chance on trials of both types with static dots. Despite encountering greater difficulty with dots that moved within the arrays, one bear was able to discriminate numerically larger arrays of moving dots, and a subset of moving dots from within the larger array, even when area and number were incongruent. Thus, although the bears used area as a cue to guide their responses, they were also able to use number as a cue. The pattern of performance was similar to that found previously with monkeys, and suggests that bears may also show other forms of sophisticated quantitative abilities.



http://dx.doi.org/10.1016/j.anbehav.2012.05.001