The ego, the superego and the id

Sarah Wilson on Freud's famous model for brain function

Identify your ‘type’ with the Myers-Briggs Type Indicator

The MBTI personality test identifies 16 personality types

The great unknown

Darian Leader explains Freud's theory of psychoanalysis and the ideas that have followed

Type A and B personalities

Sarah Wilson on the difference between type A and type B personalities

Are you prejudiced? Take the implicit association test

Long-term resaearch by Harvard on prejudice shows that most people are biased in favour of their own race

A test of character

Find out just how neurotic or extrovert you are by taking Daniel Nettle's personality test

Timeline: The development of psychology

Major dates, from Wilhelm Wundt in 1879 to Simon Baron-Cohen in 2003

Watch your (body) language

Sarah Wilson examines the meaning behind some of our most common gestures

Facial coding: detecting true emotions

Dan Hill reveals what to look for if you want to know what someone's really thinking

Falling, flying or being naked: what our dreams really mean

Sarah Wilson interprets the most popular dream themes