A self-report measure of the personality trait of agreeableness produces very similar scores each time the same person completes it. It is also strongly correlated with whether family members describe a person as friendly and cooperative. This measure appears to be
A) reliable and valid.
B) valid but not reliable.
C) reliable but not valid.
D) neither reliable nor valid.

Question

Quizplus · Accepted Answer

The measure is producing consistent scores each time it is completed, indicating reliability. It is also strongly correlated with a relevant external measure (family members describing the person as friendly and cooperative), indicating validity. Therefore, the measure is both reliable and valid.

A Self-Report Measure of the Personality Trait of Agreeableness Produces