As part of a study examining the role of different teaching methods on children's math abilities, Dr. Garneau tested the children using a standardized math test. He gave the test to Grade 5 classes for two years in a row. In Year 1, the standard teaching method was used. In Year 2, a new teaching method was used. In Year 1, the test was administered in October, near the beginning of the school year. In Year 2, the test was administered in May, near the end of the school year. Although Dr. Garneau's results suggest that children in Year 2 demonstrated more math skills than children in Year 1, why are Dr. Garneau's results not very useful?

Question

Quizplus · Accepted Answer

Dr. Garneau's results are confounded by the time of year the children were tested, as the test was administered in October for Year 1 and May for Year 2. This means the results may not be comparable due to potential differences in what the children had learned up until the test date. There were no control group or different children used in each group, so options A, C, and D are not applicable.

As Part of a Study Examining the Role of Different