APA Research Methods and Statistics 2

Question 1

A researcher measures anxiety before and after a treatment in the same group. Which statistical test is most appropriate?

Accepted Answer

Paired-samples t-test

Answer

Independent-samples t-test

Answer

Chi-square test

Answer

One-way ANOVA

Question 2

What does internal validity refer to in psychological research?

Accepted Answer

The degree to which changes in the DV are caused by the IV

Answer

Whether findings generalize to the real world

Answer

Whether a test measures what it claims to measure

Answer

Consistency of results across studies

Question 3

Which sampling method gives every member of the population an equal chance of being selected?

Accepted Answer

Simple random sampling

Answer

Convenience sampling

Answer

Quota sampling

Answer

Purposive sampling

Question 4

In APA Publication Manual format, how should a statistically non-significant result be reported?

Accepted Answer

p > .05 with actual p-value, e.g., p = .21

Answer

NS without further detail

Answer

p = 1.00

Answer

The result should be omitted

Question 5

What is the main advantage of a within-subjects design over a between-subjects design?

Accepted Answer

It requires fewer participants and reduces error variance

Answer

It eliminates order effects

Answer

It allows for larger sample sizes

Answer

It prevents attrition

Question 6

Which type of reliability refers to consistency of a measure across different raters?

Accepted Answer

Inter-rater reliability

Answer

Test-retest reliability

Answer

Internal consistency

Answer

Parallel-forms reliability