And some, in their desperation to get potty training right, try an incoherent mix of all three. Whichever technique we choose, however, what is clear is that we are all doing it later than we used to. The average toddler is potty trained at three, an estimated nine months after its grandparents. Now the Big Toilet Project, a team of scientists, wants the public’s help to understand why — and perhaps reverse the trend. When it comes to potty training, they are asking what works, when does it start in different parts of the world and why is it that, according to
