Practice Questions Chapter 8 (f15)

Practice Questions Chapter 8 (f15) - Practice Questions...

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Practice Questions Chapter 8 1. An investigator wants to see whether packaging information affects the way people rate breakfast cereal. The same cereal is put in three packages: (a) a brown box that says, "To start your day off with a smile"; (b) a yellow box that says, "For extra energy all day"; and (c) a white box that says, "Fortified with B complex and iron." In this study the A) kind of cereal is confounded with color of the box. B) package information is confounded with color of the box. C) package information is confounded with kind of cereal. D) package information is confounded with color blindness. I chose D. because the package information changes while the cereal stays the same, making the package information the confounding variable. 2. A researcher wants to find out whether gross motor coordination is better in the morning or in the afternoon. To measure coordination, participants balance a book on their heads first in the morning and then in the afternoon. What is confounded with the independent variable? A) Practice is confounded with the time of day. B) Practice is confounded with participants. C) The participants aren't matched. D) All of these I chose A. because a confounding variable occurs when the effects of the independent variable and an uncontrolled variable are intertwined so you cannot determine which of the variables is responsible for the observed effect. 3. An experiment can be assumed to have internal validity if I chose B. because when he results of an experiment can confidently be attributed to the effect of the independent variable the experiment is said to have internal validity.
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