Extras

Eye-catching studies that didn't make the final cut:

Psychologists who study babies need to consider whether their little participants are weighed down with too much clothing or equipment.

The executive secretarial task - an ecologically valid test of executive function.

Theory of mind, or being able to think about other people's mental states, continues to improve between late adolescence and adulthood.

Children raised bilingual show superior conversational awareness and understanding.

Hypnosis as a research method.

A light touch from a doctor on the arm of a patient improves adherence to drug treatment.

Fathers, like mothers, show a bias for holding babies on their left-hand side.

People's Facebook profiles reflect their actual personality, not an idealised version of it.