Mr. Fradigio would like to investigate the effectiveness of forehead bandages on the retention of information among high school seniors in his school district. He believes that the tighter students tie their bandages the better they will recall lecture material. To see if his theory is correct, one-third of his morning history class wear extremely tight bandages, one-third wear moderately tight
bandages, and one-third wear loose fitting bandages. To control for morning daydreamers, he asks his afternoon class to do the same. Each class does as he requests for each lecture. He then administers the regularly scheduled exam to each of the classes. He scores the exams without knowing which class or bandage group they came from. He repeats the same experiment the following term with a new group of students. He then writes about his experiment and reports the results in the weekly school newsletter. Mr. Fradigio's inquiry is an example of
a. using constructivist teaching methods.
b. the scientific method.
c. selection and interpretation of data.
d. unsystematic observation.
B
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