Unit 2 Research Methods: Thinking Critically With Psychological Science

Question 1

Find the mode of the following distribution: 5, 10, 5, 1, 3, 0

Accepted Answer

5

Question 2

If you flip a coin ten times and all ten flips are tails, what are the odds that the next flip will be heads?

Accepted Answer

50%

Question 3

What percentage of the scores in a normal distribution falls within one standard deviation on either side of the mean?

Accepted Answer

68%

Question 4

What do we call the tendency to exaggerate the correctness or accuracy of our beliefs and predictions prior to testing?

Accepted Answer

Overconfidence

Question 5

Which of the following correlation coefficients represents the strongest relationship between two variables?

Accepted Answer

-0.95

Question 6

The perception of a relationship where none exists.

Accepted Answer

Illusory Coefficient

Question 7

Descriptive statistics _____________, while inferential statistics ___________.

Accepted Answer

summarize data; determine if data can be generalized to other populations

Question 8

Which of the following is used only in correlational studies?

Accepted Answer

Scatterplot

Question 9

The tendency to believe, after learning an outcome, that one would have foreseen it.

Accepted Answer

Hindsight Bias

Question 10

Which ethical principle requires that at the end of the study participants be told of the true purpose of the research?

Accepted Answer

Debriefing

Question 11

When a distribution of scores is skewed, which of the following is the most representative measure of central tendency?

Accepted Answer

Median

Question 12

A carefully worded statement of the exact procedures used in a research study.

Accepted Answer

Operational Definition

Question 13

Which descriptive statistic can be used to describe how close a student’s SAT score is to a school’s average SAT score?

Accepted Answer

Standard Deviation

Question 14

Which of the following is a potential problem with case studies?

Accepted Answer

They may be misleading because they don’t fairly represent other cases.

Question 15

Which of the following questions is best investigated by means of a survey?

Accepted Answer

Are people more likely to vote democrat or republican in an election?

Question 16

Find the mean of the following distribution: 5, 10, 5, 1, 3, 0

Accepted Answer

4

Question 17

A representation of scores that lack symmetry around their average value.

Accepted Answer

Skewed Distribution

Question 18

How would describe the correlation between two variables with the correlation coefficient r = -1.00?

Accepted Answer

Strong negative correlation

Question 19

A study in which the subjects do not know if they are in the experimental or control group.

Accepted Answer

Single-Blind Study

Question 20

What type of group does not get exposed to treatment?

Accepted Answer

The control group

Question 21

The effect of one or more manipulated variables on some measurable behavior.

Accepted Answer

Dependent Variable

Question 22

Which of the following is NOT a measure of central tendency?

Accepted Answer

Range

Question 23

Which of the following is a positive correlation?

Accepted Answer

As study time decreases, students achieve lower grades.

Question 24

In which of the following ways can our hypotheses be tested and our theories can be refined?

Accepted Answer

All of the above

Question 25

Which statistical measure of central tendency is most affected by extreme scores?

Accepted Answer

Mean

Question 26

A testable prediction, often implied by a theory.

Accepted Answer

Hypothesis

Question 27

Find the range of the following distribution: 5, 10, 5, 1, 3, 0

Accepted Answer

10

Question 28

A technique for ascertaining the self-reported attitudes or behaviors of a particular group.

Accepted Answer

Survey

Question 29

How does a sample relate to a population?

Accepted Answer

You can take a sample from a population

Question 30

What must a researcher do to fulfill the ethical principle of informed consent?

Accepted Answer

Allow participants to choose whether to take part.

Unit 2 Research Methods: Thinking Critically With Psychological Science

Questions 30

Unit 2 Research Methods: Thinking Critically With Psychological Science

Questions 30