LOUISE MURRAY / SCIENCE PHOTO LIBRARY LOUISE MURRAY / SCIENCE PHOTO LIBRARY
Dog intelligence research. Pet dog performing a means end test in which it must make the connection between an action and a reward. To succeed in this test, the dog must pull the rolling board under a fence to access the reward. Photographed at the Clever Dog Lab, University of Vienna, Austria. This lab researches the problem-solving and learning abilities of dogs, their perception of the environment and their relationships to humans.
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