Final answer:
Convenience sampling is a suitable approach when subjects are hard to find. However, it should be used with caution due to potential biases and limitations in generalizability.
Step-by-step explanation:
When subjects (people) in your evaluation are hard to find, one of the best approaches to sampling is convenience sampling. Convenience sampling involves selecting subjects who are readily available and easily accessible. While convenience samples may not represent the entire population accurately, they can still provide useful insights in certain situations.
For example, if you are conducting a study on the effects of a new educational program in a specific school district, you could use convenience sampling to select students from that district. This approach is practical when it is difficult to reach all students in the district.
Convenience sampling should be used with caution as it may introduce bias and limit the generalizability of the results. Researchers should clearly acknowledge the limitations of convenience sampling and consider its implications when interpreting the findings.