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Canine intelligence is an umbrella term that encompasses the faculties involved in a wide range of mental tasks, such as learning, problem-solving, and communication. The Doberman Pinscher has been ranked amongst the most intelligent dog breeds in experimental studies and expert evaluations. Psychologist Stanley Coren ranks the Dobermann as the 5th most intelligent dog in the category of "obedience command training," based on the selective surveys answered by experienced trainers (as documented in his book "The Intelligence of Dogs"). Additionally, in two studies, Hart and Hart (1985) ranked the Doberman Pinscher first in the same category, and Tortora (1980) gave the Dobermann the highest rank in general trainability. Although the methods of evaluation differ, these studies have consistently shown that the Doberman Pinscher, along with the Border Collie, Standard Poodle, German Shepherd, Golden Retriever, and Rottweiler, is one of the most trainable breeds of dog.