The Intelligence of Dogs

The book's ranking focuses on working and obedience intelligence. Coren sent evaluation requests to American Kennel Club and Canadian Kennel Club obedience trial judges, asking them to rank breeds by performance, and received 199 responses, representing about 50 percent of obedience judges then working in North America. Coren found substantial agreement in the judges' rankings of working and obedience intelligence, with Border collies consistently named in the top ten and Afghan Hounds consistently named in the lowest. Dogs that are not breeds recognized by the American Kennel Club or Canadian Kennel Club (such as the Jack Russell Terrier) were not included in Coren's rankings. ==Evaluation==

Coren's book presents a ranked list of breed intelligence, based on a survey of 208 dog obedience judges across North America. and cons. Over the years, Coren's ranking of breeds and methodology have come to be accepted as a valid description of the differences among dog breeds in terms of their trainability. A 2009 measurement of canine intelligence using another method confirmed the general pattern of these rankings, and Coren included an updated study using owner ratings of dog trainability and intelligence in the 2006 edition of the book. The value of survey-based cognition findings have been dismissed by some cognitive researchers and dog trainers. The 1995 edition of Coren's book lists 130 dog breeds, and assigns them to 79 ranks with some ties, grouped into six descending categories. ==See also==