A new approach to driver training is tested and found to be effective in a sample of high school students taking a driver's education course. These students have a higher rate of passing their road tests on their first attempt compared to a control group of students taught using the older approach. Before suggesting that this method be used in driving schools that teach adults to drive, the researcher wants to be sure that this method will be equally effective for adult student drivers. The researcher is concerned about

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The researcher is concerned about sample generalization because they want to ensure that the results found in the high school student sample can be applied to a different population, in this case, adult student drivers.

A New Approach to Driver Training Is Tested and Found