Quality and Quantity in Test Validity: How can we be Sure that Psychological Tests Measure what they have to?

Riccardo Sartori, Margherita Pasini ABSTRACT: During the twentieth century, many authors have offered their contributions to the controversial subject of test validity. Thus, the concept of validity seems to be quite a simple idea until one looks at the literature on the subject. Validity can be defined as “the degree to which the test actually[…]