A researcher develops a questionnaire to assess the personality trait of impulsivity among adults.In a journal article,she presents evidence that college students tend to get essentially the same score if they take the test twice,two months apart.She also presents the average score,the highest score,and the lowest score obtained by two large samples: one of 2,000 college students,and one of 750 community-dwelling non-college adults.However,when you look at the sample questionnaire items she included in the article,it seems to you that they relate more to whether a person is sociable,outgoing,and fun than to whether an individual is impulsive.You are questioning the _____ of the researcher's questionnaire.
A) reliability
B) validity
C) sensitivity
D) reliability and the validity

Question

Quizplus · Accepted Answer

The question is referring to the validity of the questionnaire, which is the extent to which the items on the test accurately measure the construct being assessed (in this case, impulsivity). The fact that the items seem to be more related to sociability than impulsivity suggests that the questionnaire may lack validity. The evidence of consistent scores over time speaks to reliability, but this is not the primary concern raised by the question.

A Researcher Develops a Questionnaire to Assess the Personality Trait