Question 1

Which of the following best describes the difference between a theory and a hypothesis in psychological research?

Accepted Answer

A theory is a broad explanation for a set of observations, while a hypothesis is a specific, testable prediction derived from a theory.

Question 2

A researcher wants to study the effect of sleep deprivation on memory recall. She randomly assigns participants to either a sleep-deprived group or a well-rested group and measures their performance on a memory test. What is the independent variable in this experiment?

Accepted Answer

The amount of sleep participants receive

Question 3

Which of the following best illustrates the concept of external validity in psychological research?

Accepted Answer

The degree to which study findings can be generalized to other settings, populations, or times

Question 4

A psychologist is interested in the relationship between stress and academic performance. She finds a correlation coefficient of $$r = -0.65. $$What does this indicate?

Accepted Answer

There is a strong negative relationship between stress and academic performance.

Question 5

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

Accepted Answer

Neither the participants nor the experimenters know which participants are in the control or experimental group.

Question 6

A researcher finds that people who eat more vegetables tend to have lower blood pressure. Which type of research design is most likely being used?

Accepted Answer

Correlational design

Question 7

Which of the following best describes the function of the myelin sheath in the nervous system?

Accepted Answer

It insulates axons and speeds up the transmission of neural impulses.

Question 8

If a person suffers damage to Broca's area in the brain, which of the following symptoms are they most likely to experience?

Accepted Answer

Difficulty producing fluent speech

Question 9

Which neurotransmitter is most directly associated with movement, reward processing, and attention, and is implicated in Parkinson's disease?

Accepted Answer

Dopamine

Question 10

A psychologist wants to ensure that her sample accurately reflects the population she is studying. Which sampling method should she use?

Accepted Answer

Random sampling

Question 11

Which of the following best describes the difference between an agonist and an antagonist in neuropharmacology?

Accepted Answer

An agonist mimics or enhances the action of a neurotransmitter, while an antagonist blocks or inhibits its action.

Question 12

Which of the following is a key characteristic of a case study?

Accepted Answer

It provides an in-depth analysis of a single individual or a small group.

Question 13

A researcher is interested in whether a new teaching method improves student performance. She randomly assigns students to either the new method or the traditional method and compares their test scores. Which statistical test would be most appropriate to determine if there is a significant difference between the two groups?

Accepted Answer

Independent samples t-test

Question 14

Which of the following best describes the function of the occipital lobe?

Accepted Answer

Processing visual information

Question 15

Which of the following is an example of a quasi-experimental research design?

Accepted Answer

Comparing outcomes between groups that already exist, such as smokers and non-smokers

Question 16

Which of the following best describes the difference between genotype and phenotype?

Accepted Answer

Genotype is the genetic makeup, while phenotype is the observable characteristics.

Question 17

A researcher finds that the mean test score for a group of students is $$\80$$\$$ with a standard deviation of $$\$$10\. If a $$student scored $$\100$$\$, what is their z-score?

Accepted Answer

$$z = 2$$

Question 18

Which of the following is a major ethical principle in psychological research involving human participants?

Accepted Answer

Participants must give informed consent before participating.

Question 19

Which of the following best describes the function of the corpus callosum?

Accepted Answer

It connects the left and right hemispheres of the brain, allowing communication between them.

Question 20

Which of the following best describes the difference between the sympathetic and parasympathetic nervous systems?

Accepted Answer

The sympathetic system prepares the body for action, while the parasympathetic system calms the body.

Introduction to Psychological Science: Key Concepts, Research Methods, and Biological Psychology

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