2.5 Let us go back to the example used in the chapter of the supermarket marketing manager who theorises that the introduction of a loyalty card will mean that regular customers are less likely to shop at competitor supermarkets. This could be the research proposal’s starting point, i.e., a hypothesis that the introduction of a loyalty card will mean that regular customers are less likely to shop at competitor supermarkets. This prompts thoughts about the possible use of literature in the proposal and the research project itself. This literature could have at least two strands. First, a practical strand which looks at the research evidence which lends credence to the hypothesis. Second, a more abstract strand that studies human consumer behaviour and looks at the cognitive processes which affect consumer purchasing decisions. This ensures that the proposal and resultant research project are both theory driven and also ensures that relevant theory is covered in the literature.