For example:
When the teacher conducts a speaking test, the scoring analysis for the test includes several factors in the final score: pronunciation, fluency, grammatical accuracy, vocabulary use, and socio linguistics appropriateness. The justification of these five factors lies in the theoretical construct that claims those factors to be major components of oral proficiency. But if he conducts a test that evaluated only pronunciation and grammar, he could be justifiably suspicious about the construct validity of that test.