We all know it’s true, but now there is more evidence that dogs are smarter than cats. A new study, reported in the Guardian newspaper suggests cats don’t understand cause and effect as well as dogs do. Tests were carried out by a Psychology lecturer Britta Osthaus. She set a group of 15 cats a simple task: attaching fish and biscuit treats to one end of a piece of string, placing them under a plastic screen to make them unreachable and then seeing if the cats could work out that pulling on the other end of the string would pull the treat closer. The test was conducted using three different arrangements of string: a single baited string, two parallel strings where only one was baited, and two crossed strings where only one was baited. Cats had no problem solving the problem with a single string. With the other two tests, however, they fared much worse. No cat correctly chose between the two parallel strings. Dogs, on the other hand, performed much better, especially in the parallel string test. Osthaus, of Canterbury Christ Church University, Kent, said: "This finding is somehow surprising as cats regularly use their paws and claws to pull things towards them during play and hunting. They performed even worse than dogs, which can at least solve the parallel string task. I am not trying to say cats are stupid, just they are different.” We all second that final thought, I'm sure.