37. Which of the following is a way to assess the predictive validity of an algebra test? A) Correlate test scores with teacher ratings in algebra B) Correlate test scores with success as an engineer C) Correlate test scores with algebra grades D) Correlate test scores with scores on algebra homework assignments 38. Which of the following is the best way to control for the unwanted influence of maturation processes in an experiment? A) Increase the sample size for the experiment B) Use a pretest as well as a posttest C) Use a control group D) Use subjects who have stabilized with regard to maturational level. 39. Subjects performing well merely because they are being observed (and not necessarily because of any effect of treatment) are considered to be under the influence of A) the Hawthorne effect B) the novelty effect C) the halo effect D) none of the above. 40. A threat to internal validity is the same as: A) bias on the part of the researcher B) an alternative causal explanation of results C) a limitation on the generalizability of results D) poor internal consistency of scores