Darby is the head of human resources for a manufacturing company. They are contacted by a sales representative fron a company that designs and sells personality tests. The representative tells Darby they can use the test for free and suggests that they use it to make hiring decisions. Before implementing a measure into the hiring process, it is most important that Darby know

how much the measure actually costs.

how many people have taken the test before.

whether it is a self$-$report or projective test.

whether the test has good reliability and validity.