Psychology Degree FREE Psychology Degree Psychological Research Methods Questions and Answers 2

Question 1

A researcher wants to determine whether sleep deprivation causes decreased reaction time. Which research design is most appropriate?

Accepted Answer

True experiment with random assignment

Answer

A true experiment with random assignment allows the researcher to manipulate the independent variable and establish causation.

Question 2

What is the primary purpose of a double-blind procedure in psychological research?

Accepted Answer

To reduce demand characteristics and experimenter bias

Answer

Double-blind procedures prevent both participants and researchers from knowing group assignments, reducing bias from both sources.

Question 3

Which measure of central tendency is most affected by extreme scores in a data set?

Accepted Answer

Mean

Answer

The mean is calculated using all values in the distribution, making it highly sensitive to outliers.

Question 4

In a study examining the relationship between anxiety and test performance, anxiety level is the independent variable and test score is the dependent variable. What type of validity is threatened if the anxiety manipulation also unintentionally changes participants' motivation?

Accepted Answer

Internal validity

Answer

Internal validity is compromised when a confounding variable like motivation co-varies with the independent variable.

Question 5

A psychologist surveys 500 college students about their study habits and GPA. Which correlation coefficient indicates the strongest relationship?

Accepted Answer

r = -0.87

Answer

The strength of a correlation is determined by its absolute value, and 0.87 is the largest regardless of direction.

Psychology Degree Practice Test

Psychology Degree Practice Test

Psychology Degree FREE Psychology Degree Psychological Research Methods Questions and Answers 2