APA Research Methods and Statistics 3

Question 1

What is a Type I error in hypothesis testing?

Accepted Answer

Rejecting a true null hypothesis

Answer

A Type I error (false positive) occurs when a researcher rejects a null hypothesis that is actually true, with probability equal to alpha.

Question 2

Which APA ethical principle requires psychologists to be honest and non-deceptive in their work?

Accepted Answer

Integrity

Answer

APA's ethical principle of Integrity calls for honesty, accuracy, and avoidance of fraud, deception, or misrepresentation in professional work.

Question 3

What does 'statistical power' measure in a research study?

Accepted Answer

The probability of detecting a true effect when it exists

Answer

Statistical power is the probability that a study will correctly reject a false null hypothesis, i.e., detect a real effect when one exists.

Question 4

In APA's CONSORT-style reporting, what information must accompany a reported effect size?

Accepted Answer

Confidence interval

Answer

APA recommends reporting effect sizes alongside confidence intervals to convey both the magnitude and precision of the estimate.

Question 5

Which of the following best describes a meta-analysis?

Accepted Answer

A statistical synthesis of results from multiple independent studies

Answer

A meta-analysis statistically combines effect sizes from multiple studies on the same topic to estimate an overall effect and examine variability across studies.

APA - American Psychological Association Practice Test

APA - American Psychological Association Practice Test

APA Research Methods and Statistics 3