"Social scientists collect evidence to support their claims and theories in different ways. Such evidence is crucial to the practice of social science and to the production of social scientific knowledge. You may be aware of the idea of active reading, which is about reading with the aim of understanding and grasping something: a definition, an argument, a piece of evidence. What that suggests is that active reading is about reading and thinking at the same time. In this unit we will concentrate on reading and thinking at the same time about evidence in the form of numbers and in the form of text."