NPE Research Methods and Statistics

Question 1

Which research design allows investigators to draw causal conclusions about the relationship between variables?

Accepted Answer

True experimental design

Answer

True experimental designs with random assignment and manipulation of an independent variable are the only designs that support causal inferences.

Question 2

A researcher finds a p-value of 0.03 using an alpha level of 0.05. What is the correct interpretation?

Accepted Answer

The result is statistically significant and the null hypothesis is rejected

Answer

A p-value of 0.03 is below the alpha level of 0.05, so the null hypothesis is rejected and the result is considered statistically significant.

Question 3

Which type of validity refers to the degree to which a test actually measures the construct it purports to measure?

Accepted Answer

Construct validity

Answer

Construct validity evaluates whether a test truly captures the theoretical construct it is designed to measure.

Question 4

In a double-blind randomized controlled trial, which parties are unaware of the treatment condition assignment?

Accepted Answer

Both participants and researchers administering the treatment

Answer

In a double-blind design, both participants and the researchers interacting with them are unaware of group assignment, reducing expectancy and placebo effects.

Question 5

A psychologist administers the same test twice to a group of clients one month apart. She is assessing which type of reliability?

Accepted Answer

Test-retest reliability

Answer

Test-retest reliability measures the stability of scores over time by correlating results from two administrations of the same test.

NPE - National Psychology Exam Practice Test

NPE - National Psychology Exam Practice Test

NPE Research Methods and Statistics