Chapter 16 Research Objectives Understand the various forms of nutrition research including epidemiological, historical, descriptive survey, analytical survey, and experimental. Be able to identify which type of research is being used to generate the findings you are observing Understand how to identify the quality of the research by examining values such as validity, reliability, accuracy and precision Know some of the insoluble and soluble problems that can be faced when doing research. Understand some of the limitations of Web based information on nutrition and supplementation.

Major Types of Research Used in Nutrition Research Epidemiological research Prospective (cohort) Retrospective Historical Descriptive survey Analytical survey Experimental Pre-test,post-test; crossover Clinical trials

Table 16-2, p. 555 Descriptive Survey

Fig. 16-2, p. 557 Analytical Survey Method

Fig. 16-3, p. 558 Experimental Method

Table 16-3, p. 559

Table 16-4, p. 559

Table 16-5, p. 560

Table 16-6, p. 560

How to Determine the Quality of the Research Validity – concerned with the effectiveness of the measuring instrument Face validity Criterion validity Internal or external validity Accuracy Reliability Precision

Table 16-8, p. 563

Table 16-7, p. 562