I follow the logic, but I'm not sure homo economicus axioms about the transitivity of preferences necessarily applies to babies. (They also attempted to rule out infants just preferring novel toys, but I'm not sure 58% vs 70% is that decisive a difference for n<50, especially when you acknowledge you've excluded more than a third of the participants in some of the trials for not choosing or bursting into tears!)
I can imagine my brother's wife having fun testing with their daughter though :D
I can imagine my brother's wife having fun testing with their daughter though :D