In search of intelligent animals We spent nine months looking at the human brain, and one episode looking at the cognitive abilities of plants. Today, we try and figure out how to figure out whether or not an animal is intelligent. Here are a couple of articles about Clever Hans, the classic example of how researchers can be tricked by their own bad self. Clever Hans: cueing and the observer effect The “Clever Hans Phenomenon” revisited And here are a couple of links about intelligence in animals and how it’s studied. Measuring animal intelligence This is How You Study The Evolution of Animal Intelligence