Q: Which of the following formulas correctly calculates the mean of a set of scores $$x_1$$, $$x_2$$, ..., x_n$$?

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

Question 1

Which of the following best describes the biopsychosocial model in psychology?

Accepted Answer

It integrates biological, psychological, and social factors to understand behavior and mental processes.

Question 2

Which psychologist is most closely associated with the development of behaviorism?

Accepted Answer

John Watson

Question 3

A researcher wants to study the effect of sleep deprivation on memory. She randomly assigns participants to either a sleep-deprived group or a control group and measures their memory performance. Which type of research design is she using?

Accepted Answer

Experimental design

Question 4

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

Accepted Answer

Measuring intelligence by the score on a standardized IQ test.

Question 5

If a distribution of test scores is skewed to the right, which measure of central tendency is most likely to be greater than the others?

Accepted Answer

Mean

Question 6

Which of the following best illustrates the concept of nature versus nurture?

Accepted Answer

A child’s language development is influenced by both genetic predispositions and the environment in which they are raised.

Question 7

Which of the following is NOT one of the five characteristics of quality scientific research?

Accepted Answer

Confirmation bias

Question 8

A psychologist wants to ensure that her study can be replicated by other researchers. Which concept is she most concerned with?

Accepted Answer

Reliability

Question 9

Which neurotransmitter is primarily involved in muscle movement and is deficient in individuals with Parkinson’s disease?

Accepted Answer

Dopamine

Question 10

Which part of the nervous system is responsible for the 'fight or flight' response?

Accepted Answer

Sympathetic nervous system

Question 11

A researcher finds that as hours spent studying increase, exam scores also increase. Which statistical concept best describes this relationship?

Accepted Answer

Positive correlation

Question 12

Which of the following formulas correctly calculates the mean of a set of scores $$x_1$$, $$x_2$$, ..., x_n$$?

Accepted Answer

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

Question 13

Which of the following best describes the difference between quantitative and qualitative research?

Accepted Answer

Quantitative research focuses on numerical data, while qualitative research focuses on non-numerical data such as interviews and observations.

Question 14

Which of the following is an example of a double-blind study?

Accepted Answer

Neither the participants nor the researchers know who is receiving the treatment or placebo.

Question 15

Which of the following statements about phrenology is correct?

Accepted Answer

Phrenology proposed that bumps on the skull could reveal mental abilities and personality traits.

Question 16

Which of the following best describes the concept of epigenetics?

Accepted Answer

Epigenetics refers to changes in gene expression that do not involve changes to the underlying DNA sequence.

Question 17

Which of the following is a function of the endocrine system?

Accepted Answer

Releasing hormones that regulate bodily processes.

Question 18

A student is asked to identify the mode in the following set of scores: 2, 4, 4, 5, 6. What is the correct answer?

Accepted Answer

4

Question 19

Which of the following best describes the process of transduction in sensation?

Accepted Answer

The process by which sensory receptors convert physical energy into neural signals.

Question 20

According to Weber’s Law, which equation best represents the relationship between the just noticeable difference (JND) and the magnitude of the original stimulus $$S$$?

Accepted Answer

$$ 	ext{JND} = k 	imes S $$

Foundations of Psychology: Key Concepts and Theories

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