Comment by doubleunplussed

Many specific studies on the matter don't replicate, I think the book preceded the replication crisis so this is to be expected, but I don't think that negates the core idea that our brain does some things on autopilot whereas other things take conscious thought which is slower. This is a useful framework to think about cognition, though any specific claims need evidence obviously.

TBH I've learned that even the best pop sci books making (IMHO) correct points tend to have poor citations - to studies that don't replicate or don't quite say what they're being cited to say - so when I see this, it's just not very much evidence one way or the other. The bar is super low.