Psychology- study of behaviour and factors that influence it. Behaviour- actions we observe directly and the processes (mental events)- thoughts, feelings, images, physiological reactions. Psychologists look at biological, individual, and environmental aspects. Explores nature and causes of our behaviour and feelings (motives and thoughts) Basic research- quest for knowledge: describe how people behave and identify the factors that influence or cause a type of behaviour. Applied research- designed to solve specific practical problems: uses principles discovered through basic research to solve practical problems. Jigsaw program- applied research program where knowledge gained from basic research on factors that increase and decrease intergroup hostility: translated into a cooperative learning program designed to reduce interracial hostility in racially integrated schools. Four main goals: describe behaviours, explain and understand causes and behaviours, predict behaviours under certain conditions, influence and control behaviours with knowledge and control of causes to enhance human welfare.