Researchers in Scotland are attempting to come up with an easy, fast and reliable canine IQ test. This comes after an initial study showed that much like in humans, intelligence in dogs varies considerably. Similarly to human IQ tests, the canine IQ test used spatial patterns and problem solving to determine an underlying intelligence. To administer the test as fairly as possible the researchers recruited 68 border collies raised on farms in Scotland. They also tested to make sure the dogs had a similar upbringing. They then set about constructing a series of detour and choice-based tests. To ensure a fair ranking, all the testers wore the same outfit and presented a similar demeanor to all the dogs.