Reynolds, Gretchen. How Fat May Hurt the Brain, and How Exercise May Help. http://well.blogs.nytimes.com/2014/03/05/how-fat-may-harm-the-brain-and-how-exercise-may-help/

This article reviews a study done upon animals, discovering obesity has a harmful effect on the brain.  The article’s topic is the effects fat and exercise has upon the brain.   Therefore the research question becomes: does fat hurt the brain?

The data type needed for this study will be recordings of acts, behaviors and/or events.  This type of data is needed to determine the health of subjects.  Since the site for retrieval was animal studies, the data retrieval method will be control experimentation.  The data will be extracted through observsations recorded into private or public records.  From there the data can be exported to analyze.

The data analysis method can be compared using a chi square test; to compare subjects in two categories: those that are obese and those that are not obese.   I believe this study is valid.  The study was medically done, providing the researchers equipment to analyze the subjects in-depth physically.  The researchers discovered that the fat effects the brain, because our blood carries all nutrients and toxins throughout our body.  People generally believe their brains are not affected by the toxins they eat, but the whole body is affected by the toxins and nutrients consumed.