Which statement best describes convergent and discriminant validity in the context of construct validity?

Which statement best describes convergent and discriminant validity in the context of construct validity?

• A. Convergent validity shows distinctness from related constructs.
• B. Convergent validity shows that the measure relates to other measures of the same construct, while discriminant validity shows it's not related to different constructs.
• C. Validity is not important.
• D. Convergent validity concerns reliability.

Answer: (B)

Convergent and discriminant validity look at how a measure fits with other measures in the realm of construct validity. Convergent validity means a measure should show strong relationships with other measures that assess the same construct, indicating it is indeed tapping what it’s supposed to. Discriminant validity means the same measure should show weaker relationships with measures of different constructs, showing it isn’t capturing something unrelated. So, the statement is best because it accurately describes both aspects: the measure relates to other measures of the same construct (convergent) and is not related to measures of different constructs (discriminant). For example, a new scale for depressive symptoms should correlate with established depression scales (convergent) but not strongly with scales that assess unrelated traits like physical stamina (discriminant). This distinction helps establish that the instrument measures the intended construct rather than something else. The other options miss the mark: stating that convergent validity shows distinctness from related constructs describes discriminant validity, claiming validity isn’t important discounts a fundamental psychometric principle, and saying convergent validity concerns reliability confuses two different concepts.