Psychology has many practical uses. It helps us to understand, explain, predict, or modify what goes on in the mind: the control centre for cognition, affect, and behaviour. ‘What is psychology for?’ looks at where professional psychologists work, the uses and abuses of psychology, the progress and complexity of psychology today, and what the future holds. One exciting challenge for psychologists today is in bringing together the products of some of its different specializations. This endeavour has contributed to the development of ‘cognitive science’, in which scientists from many different fields, not just psychology, are now working together to further our understanding of mental functions — of brain and behaviour.