NSC 170C1 1st Edition Lecture 3 Outline of Last Lecture I Health is more than the absence of disease Outline of Current Lecture II Scientific Method A Steps B Research i Parts III Nutritionist Current Lecture I Scientific Method the process by scientist use to design experiments A Observe ask a question B Form a hypothesis C Experiment D Conclusion E The scientific method involves sharing findings with the scientific community sharing their findings to a journey F Research i Lavatory Research conducted in a laboratory may involve animals such as rats ii Observational research involves looking at factors in two or more groups of subjects to see if there is a relationship to certain health outcomes iii Epidemiological Research a type of observational research that looks at populations of people I e the relationship between sun exposure and incidence of rickets in Norway compared with Australia iv Experimental research involves at least two groups of subjects a Experimental group given a specific treatment b Control group not given the treatment often receive a placebo or sugar pill instead Double blind placebo controlled study the gold standard of experimental research c Neither scientists nor subjects know which group is receiving which treatment All variables are the same and controlled in both groups This method helps eliminate bias II Nutritionist A Registered dietitian RD i Completed at least a bachelor s degree at an accredited U S college or university ii Completed an ADA approved supervised practice and passed an exam administered by the ADA iii Qualified to provide medical nutrition therapy Public health nutritionist may have a degree in nutrition but may not be an RD B Quack watchers i Quackery the promotion and selling of health products and services of questionable validity ii Americans spend billions annually on fraudulent health products iii Sellers may use testimonials and false claims that aren t backed by sound science and research iv Sellers may make unrealistic promises and guarantees
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