James Mark Baldwin

The science can tell you that the thousands of pseudo-scientific parenting books out there - not to mention the 'Baby Einstein' DVDs and the flash cards and the brain-boosting toys - won't do a thing to make your baby smarter. That's largely because babies are already as smart as they can be; smarter than we are in some ways.

I studied psychology for a couple of years as a personal hobby, so you start learning about people and listening to your intuition, like when you you're feeling that people are not being entirely straight with you.