Question

Laura has developed a new treatment to increase spatial ability. She randomly assigns students to either her intervention or a control condition. In the treatment condition students engage in working puzzles for twenty minutes a day for 10 days. Unfortunately, students don"t like her intervention and refuse to do puzzles for all of the days. When she examines post-test means on the spatial ability measure, there are no differences between her treatment and the control condition.
Which of the following demonstrates a threat to validity demonstrated in this study?
a. Maturation
b. Testing
c. Instrumentation
d. Mortality

Answer

This answer is hidden. It contains 1 characters.