06 A researcher performs an experiment to determine how hormones affect pair bon

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06 A researcher performs an experiment to determine how hormones affect pair bonding in humans. She has two groups of women in the experiment. Women in one group are given an injection of oxytocin while women in the other are given an injection of saline. Both groups then read a paragraph describing someone they might fall in love with. Three days later the researcher measures how attached the women feel to the people they read about in the paragraph. What is the control group in this study?

Select one:

a. The women receiving the oxytocin injection

b. The women receiving the saline injection

c. The sex of the participants in the study

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07 A researcher performs an experiment to determine how hormones affect spatial memory. She has two groups of women in the experiment. Women in one group are given an injection of estradiol while women in the other are given an injection of saline. Three days after the injection she tests how quickly the women learn to navigate their way through a virtual maze. What is the dependent variable in this study?

Select one:

a. The sex of the participants in the study

b. How quickly the women learn to navigate through the maze.

c. The saline injection

d. The hormone injection

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08 A researcher attends several parties to study human courtship behavior. She observes that men with broad shoulders are approached by potential sexual partners (male or female) more quickly than men with more narrow shoulders. Can the researcher conclude that having broad shoulders causes men to be approached more quickly?

Select one:

a. No

b. Yes

c. Maybe

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09 What causes menstruation?

Select one:

a. A decrease in progesterone levels

b. An increase in estrogen levels

c. The mid-cycle surge in LH levels

d. A decrease in the expression of 5-reductase

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10 What is the precursor molecule from which all adrenal and gonadal steroid hormones are made?

Select one:

a. Cholesterol

b. Protein

c. P450scc

d. Testosterone

Explanation / Answer

(6) b. The women receiving the saline injection

the control group is treated exactly the same way the experimental group except for the chemical to be tested.

(7) b. How quickly the women learn to navigate through the maze.

A dependent variable is a variable being tested and measured in a scientific experiment.

(8)c. Maybe

The researcher needs to control for a number of factors to conclusively prove her hypothesis/observation to be true.

(9) c. The mid-cycle surge in LH levels

(10) a.cholesterol—the precursor to all steroid hormones

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