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Literature review is the second chapter of a research paper. It can be defined as an account which reflects what have been written about a topic by accredited researchers and scholars (Diana, 2012). Basically a researcher reflects on important facts about the current topic including findings and methodological and theoretical contribution of the topic under research which have been done by previous scholars who have conducted similar researches. Secondary sources are the only source of information in literature review for example books, newspapers, journals, periodicals and other published written materials. Thus literature review should be related to thesis or topic under study, suggest outcome of what is known, identify areas of weakness in research and formulate questions for future research. It should also give a conclusion on facts that previous researchers who have conducted similar studies have derived.
The writer uses literature review in this context to clarify one or more issues. Firstly he states the topic on study that is childhood obesity rates in United States of America and internationally and comorbities associated with childhood obesity. He also states the meaning of obesity, what causes obesity and how obesity is passed on between different ages and the effects of being obese. Obesity occurrence trends, rates and outline a critical analysis of comparison between years as by the previous researchers is also included in the review. The writer also examines the scope which previous writers have focused in relationship to the main topic that is childhood obesity. He also seeks to show variations between past researchers and what made their research findings to differ. The relationship between obesity and related comorbities is also looked upon to show how obesity
References: Diana R. (2012) The Literature Review: A Step-by-Step Guide for Students, Washington: SAGE.