Chapter 5. Validity The Construct Construct Underrepresentation Valid Measurement Construct Irrelevant Variance The Test FIGURE 5.1 Geometric representation of the concepts of construct underrepresentation and construct-irrelevant variance. 1. Confirm your understanding of the concepts of construct underrepresentation and construct- irrelevant variance. Draw pictures like those in Figure 5.1 to show these cases: A construct includes 12 components. A test covers six of them. In addition, test scores are just slightly influenced by factors other than these six components. b. A test aims to measure creative thinking, but the test is almost entirely just a measure of vocabulary. (Assume for this exercise that vocabulary and creative thinking ability have a low correlation.) Chapter 5. Validity The Construct Construct Underrepresentation Valid Measurement Construct Irrelevant Variance The Test FIGURE 5.1 Geometric representation of the concepts of construct underrepresentation and construct-irrelevant variance. 1. Confirm your understanding of the concepts of construct underrepresentation and construct- irrelevant variance. Draw pictures like those in Figure 5.1 to show these cases: A construct includes 12 components. A test covers six of them. In addition, test scores are just slightly influenced by factors other than these six components. b. A test aims to measure creative thinking, but the test is almost entirely just a measure of vocabulary. (Assume for this exercise that vocabulary and creative thinking ability have a low correlation.)