$$\text{Range} = \text{Maximum value} - \text{Minimum value}$$

Question 1

Which of the following best describes the Clever Hans Effect discovered by Oskar Pfungst?

Accepted Answer

The phenomenon where an animal responds to unconscious cues from humans rather than actual knowledge or reasoning.

Question 2

In the scientific investigation steps, which stage involves comparing the growth across different groups in a fertilizer experiment?

Accepted Answer

Analyze data

Question 3

What is the primary purpose of random assignment in experimental research?

Accepted Answer

To prevent confounding variables from affecting the outcome by evenly distributing participant characteristics.

Question 4

Which research method is most appropriate for observing and recording behavior without producing causal explanations?

Accepted Answer

Naturalistic observation

Question 5

A psychologist wants to test whether frustration causes aggression. Which variable should be manipulated and which should be measured?

Accepted Answer

Manipulate frustration; measure aggression

Question 6

Which of the following is a confounding variable in an experiment testing a new study program's effect on grades?

Accepted Answer

Extra studying done by program participants outside the program

Question 7

Which statement best explains why correlation does not imply causation?

Accepted Answer

A third variable may be responsible for the observed relationship between two variables.

Question 8

In Schachter's affiliation experiment, what was the independent variable?

Accepted Answer

Level of anxiety induced in participants

Question 9

Which of the following is the correct formula for calculating the range in a dataset?

Accepted Answer

$$	ext{Range} = 	ext{Maximum value} - 	ext{Minimum value}$$

Question 10

Which measure of central tendency is defined as the most frequently occurring score in a distribution?

Accepted Answer

Mode

Question 11

A researcher finds a statistically significant result with $$p \u003c 0.05. $$What does this mean?

Accepted Answer

There is less than a 5% chance that the observed difference is due to random chance.

Question 12

Which of the following best describes a double-blind experiment?

Accepted Answer

Neither the experimenter nor the participant knows which group the participant is in.

Question 13

Which statistical method is used to organize and summarize data collected in psychological research?

Accepted Answer

Descriptive statistics

Question 14

If a dataset has a high standard deviation, what does this indicate about the scores?

Accepted Answer

Scores are spread out more widely from the mean.

Question 15

Which of the following is NOT a goal of psychological research?

Accepted Answer

To manipulate data to fit a hypothesis

Question 16

A scatterplot is most useful for which type of research method?

Accepted Answer

Correlational method

Question 17

Which of the following is an example of an operational definition in an experiment?

Accepted Answer

Measuring aggression by counting the number of times a participant raises their voice during a session.

Question 18

Which research method is best suited for investigating rare or unusual cases in psychology?

Accepted Answer

Case study method

Question 19

Which of the following is a limitation of the correlational method?

Accepted Answer

It cannot predict causal links between two events.

Question 20

Which formula correctly represents the calculation of the mean for a set of scores $$x_1$$, $$x_2$$, ..., x_n$$?

Accepted Answer

$$	ext{Mean} = \frac{\sum_{i=1}^{n} x_i}{n}$$

Research Methods in Psychology: Foundations, Case Studies, and Scientific Investigation

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