Chapter 2 Review Research Principles Answers.docx

# 5 define confounding variable a confounding variable

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5.  Define confounding variable. A confounding variable is a variable that affect’s a participant’s behavior other than the variable that the  experimenter has set to used specifically for the research.   6. Give your own personal example of a placebo effect. A good example of a placebo effect could be a sugar water standing as an insect repellent or a  sugar pill acting as aspirin.  7. Distinguish between subjects design and within subjects design. Between subjects designs are when participants are randomly apart of the control group or the  manipulated group. They are assigned by chance to a particular experimental procedure. Within  subjects design are when participants are exposed to all treatments and conditions of the  experiment. 8. Draw a graph showing a high positive correlation and a low positive correlation.

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9. What is the difference between descriptive and inferential statistics? Descriptive statistics is used to characterize certain features of numerical data that is collected from an experiment while inferential statistics is used to make guesses and inferences to make decisions regarding results and how they have occurred.
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