A psychologist develops a new test for measuring a construct he calls "need for Status." However, another psychologist to whom he shows the test says it looks like a measure of "need for Achievement." What type of evidence does the first psychologist need to collect to persuade the second psychologist?
A) Internal consistency
B) Congruent validity
C) Discriminant validity
D) Behavioral validation

Question

Quizplus · Accepted Answer

Discriminant validity evidence is needed to demonstrate that the new test is measuring a distinct construct (need for Status) and not simply a variation of an existing construct (need for Achievement). This evidence could include administering both tests to a sample and assessing the correlations between scores on the two tests. If the correlation is low, it would support the distinctiveness of the two constructs being measured.

A Psychologist Develops a New Test for Measuring a Construct