Why do some people overthink everything, while others stay calm under pressure or jump headfirst into every new idea?

A new book by Oxford academic Marius Ostrowski suggests the answer lies in how we think. He’s identified ten distinct “thinker types”, from the optimistic Happy Camper to the anxious Worrywart, arguing that most of us are a mix of two or three.  He joins Fionnuala Jones to discuss…