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Exam 1: Tiinking Critically With Psychological Science

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Question 111

Multiple Choice

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The percentage of students whose average grades fall into various performance levels could be represented by a

A) standard deviation.
B) bar graph.
C) scatterplot.
D) correlation coefficient.

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Question 112

Multiple Choice

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As students prepare for a test, they often believe that they understand the course material better than they actually do. This best illustrates

A) overconfidence.
B) random assignment.
C) the placebo effect.
D) critical thinking.

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Question 113

Multiple Choice

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Statistical reasoning can help us to generalize correctly from a

Six different students spent $10, $13, $2, $12, $13, and $4, respectively, on entertainment. The mode of this group's entertainment expenditures is

In a test of the effects of sleep deprivation on problem-solving skills, research participants are allowed to sleep either 4 or 8 hours on each of three consecutive nights. This research is an example of

If psychologists discovered that people who live at the poverty level have more aggressive children than wealthy people, this would clearly indicate that

To describe the behavior of animals in their native habitats, researchers are most likely to make use of

An observed difference between two sample groups is more likely to be statistically significant if

Replication of a research study is most likely to be facilitated by

The difference between the highest and lowest scores in a distribution is the

Psychological differences between the genders are

In an experimental study of the extent to which mental alertness is inhibited by sleep deprivation, alertness would be the

Which of the following correlation coefficients expresses the weakest degree of relationship between two variables?

Which of the following is true for those assigned to a control group?

Both the researchers and the participants in a memory study are ignorant about which participants have actually received a potentially memory-enhancing drug and which have received a placebo. This investigation involves the use of

Which of the following correlations expresses the strongest degree of relationship between two variables?

Thinking that she had outperformed most of her classmates, Glenda was surprised to receive just an average grade on her psychology test. Glenda's experience best illustrates

When every individual in a large population has a small but equal chance of being included in a survey, researchers are using a procedure known as

Which of the following is the measure of central tendency that would be most affected by a few extreme scores?

A correlation between levels of impulsiveness and annual income of -0.75 would indicate that