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Alternative Explanations - Matching Exercise

Researchers hypothesized that a nutritional education program would be an effective weight loss treatment. Each participant’s weight was recorded before and after completing the program. As expected, participants weighed significantly less after attending the program. Researchers concluded this program was a successful weight loss treatment. Researchers, however, failed to take into account several internal validity issues. Read the alternative explanations below and identify the matching term.
1


A national fitness campaign was launched during the nutritional education program.

2


Participants recorded their weight each morning during the program.

3


This was a 12-month program.

4


The weight scales used in the pretest very old and had to be replaced with a newer more modern scale.

5


Only extremely obese participants were selected to participate in the program.

Answer choices for questions 1 through 5
A)history
B)testing
C)statistical regression
D)maturation
E)instrument decay





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