The Cognitive approach began to revolutionise psychology in the late 1950s and early 1960s.Piaget is the best known cognitive development researcher who suggested that, thinking progressed through qualitative changes due to the increasing maturity of brain. He is remembered for his studies of cognitive development in children (1896-1980). The internet site, quotes.net quotes Jean Piaget as saying “The principal goal of education is to create men who are capable of doing new things, not simply of repeating what other generations have done” Cognitive psychologists are interested in how people understand, diagnose and solve problems. Cognitive research mainly focuses on how our brains process information and the research tends to take place in the laboratory than in real-life settings. The cognitive approach states that cognitive disorders have been learned, and so can be unlearned.According to Albert Ellis, when we think positively and make decisions based on reasons, we behave rationally, and as a result we are happy, competent and effective. On the other hand, prolonged irrational thinking can lead to psychological problems and abnormal behaviour.Attribution theory suggests that when we are disguised with someone's behaviour, we try to work out in our minds why the person is acting weird. According to Kelley (1967, 1973), when we are making these attributions, we work out in stages, Firstly, we try to decide whether the individual is to be blamed for his actions, secondly, whether someone else is responsible and thirdly, whether the situation itself has influenced the person to behave in such a way.Unlike cognitive approach, the psychodynamic approach focuses on the three parts of mind which are conscious, unconscious and preconscious and the three components of personality which are id, ego and superego.