Jamie is randomly assigned to participate in the experimental condition and

Jamie is randomly assigned to participate in the

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14.Jamie is randomly assigned to participate in the experimental condition, and Marie is randomly assigned to participate in the control condition of a research study. The research study must be a: a)Between-groups research design.b)Within-groups research design.c)Correlational research design.d)Confounded research design. 15. Question 1.33 from pg. 19 of your textbook: Reliability, validity, and wine ratings: You may have been in a wine store and wondered just how useful those posted wine ratings are. (They are usually rated on a scale from 50 to 100, with 100 being the top score.) After all, aren’t ratings subjective? Corsi and Ashenfelter (2001) studied whether wine experts are consistent. Knowing that the weather is the best predictor of price, the researchers wondered how well weather predicted experts’ ratings. The variables used for weather included temperature and rainfall, and the variable used for wine experts’ ratings was the number they assigned to each wine. a) Name one independent variable. What type of variable is it? Is it discrete or continuous? i. Temperature is an interval variable; continuous b) Name the dependent variable. What type of variable is it? Is it discrete or continuous? i. Wine is a nominal variable; discrete c) How does this study reflect the concept of reliability? i. I think there isn’t much reliability to the study. If you repeat this study with new people on a different day with different weather, the results are highly unlikely to be repeated. d) Let’s say that you frequently drink wine that has been rated highly by Robert Parker, one of this study’s wine experts. His ratings were determined to be reliable, and you
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find that you usually agree with Parker. How does this observation reflect the concept of validity? i. Parker consistently relies on his taste for the wine, rather than how the weather affects the taste of the wine. He is able to produce the same results every time, and consistently gives good or bad reviews on the same types of wine.
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  • Fall '17
  • Elizabeth Svoboda
  • Level of measurement, Confounding, Case-control study, Statistical terminology

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