In the 1960s study 'One year old in a northern community' (at least I think thats the title - they talked to lots of mums in their own homes in Nottingham), theres a big bit on potty training. Interestingly although 70 odd % of them said that their children were potty trained it is commented that the mum would be saying this even though the child was making big wet patches on the carpet at the time. We do have a potty out when its pre bedtime nappy off time, but DS is totally oblivious to what he's doing, so really a bit pointless ! But its a gesture..