UW-Madison NUTRSCI 132 - The Science of Nutrition (4 pages)

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The Science of Nutrition

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The Science of Nutrition


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Lecture Note
University of Wisconsin, Madison
Nutrsci 132 - Nutrition Today
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PSYCH 210 Lecture 2 Outline of Last Lecture I Which are useful means of preventing cancer II How best might you decrease carbon footprint III Syllabus Overview Outline of Current Lecture I Scientific Method a Compare to Everyday Method b Steps c Experimental Design II Observational Studies a Case Studies b Epidemiological Studies c Case Control Studies III Interventions a Animal Studies b Human Clinical Trials Current Lecture I Scientific Method a The primary method used in Nutritional Science field i Everyday Method 1 Uses Anecdotal Evidence These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute II 2 Ex Friend says Vitamin X cures headaches 3 Problems with this method class response a Medication interaction b Different cause c Volunteer Bias d Coincidence e Placebo Effect f Individual Differences metabolism g Nutritional Deficiency 4 Cannot use one person s experience for generalizing b Scientific Method Steps i Ask a question ii Formulate Hypothesis iii Test Hypothesis iv Conduct Experiment v Evaluate Outcome vi Confirm or Reject Hypothesis vii If rejected reformulate hypothesis and start again c Experimental Design i Experimental Group receive treatment ii Control Group No treatment 1 Besides treatment groups should be identical d Two types of Experiments i Intervention 1 Experimenter changes something ii Observation 1 Experimenter just watches Observational Studies a Case Study i Experimenter observes one specific case b Epidemiological Study i Def natural experiment conducted by a population on itself 1 In a large enough population there is usually enough variation in exposure ii Researcher Do differences in outcome over time correlate with exposure iii Evaluating Method 1 Advantage No intervention needed especially if intervention would be harmful 2 Disadvantage Not enough evidence to definitively conclude or disprove anything a Correlation does not prove

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