# A behavioral neuroscientist is testing the effects of

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A behavioral neuroscientist is testing the effects of adrenaline on memory using a group of 12 rats. The researcher is unsure about how much adrenaline might produce an effect on memory. One group of rats will be injected with placebo saline (0 micrograms of adrenaline). The other group will be injected with a dose of adrenaline. When deciding between a 2- microgram dose or an 8-microgram dose (both of which are safe), the researcher opts to use the 8-microgram dose. The researcher has: exaggerated the difference between the levels of the independent variable, thereby decreasing statistical power. made a Type II error.
11/8/19, 3 : 01 PM Exam 3 (Chapters 8-11): PSYC-2317-004 exaggerated the difference between the levels of the independent variable, thereby increasing statistical power. given the rats an overdose of adrenaline. 2 / 2 pts Question 2 According to Cohen's convention, a value of _____ is a large effect size.
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2 / 2 pts Question 3 A high degree of overlap between two distributions of approximately 95 percent is likely to result in a(n) _____ effect size.
11/8/19, 3 : 01 PM Exam 3 (Chapters 8-11): PSYC-2317-004 medium 2 / 2 pts Question 4 Alpha refers to:
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2 / 2 pts Question 5 As sample size increases, the test statistic increases because the: distance between distributions decreases. standard error decreases. difference between the means increases. overlap between distributions increases.
11/8/19, 3 : 01 PM Exam 3 (Chapters 8-11): PSYC-2317-004 2 / 2 pts Question 6 Assume for a given study that the null hypothesis asserts the expected value of a phenomenon is 10. A research study results in a 95 percent confidence interval reported as [7.142, 9.865]. What decision should be made based on this confidence interval?
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2 / 2 pts Question 7 Before hypothesis testing and at the beginning of a study, a researcher is advised to conduct _____ because it _____.
11/8/19, 3 : 01 PM Exam 3 (Chapters 8-11): PSYC-2317-004 Page 6 of 27 2 / 2 pts