In Engpsh, the term for design effect is "design effect," or "deff" for short. This term is used in statistics to describe the impact of a particular study design on the precision of the results. For example, if a study uses a stratified sample, this could increase the design effect and make the results less precise. Here are some example sentences in Engpsh:

The design effect of our study was 1.2, indicating that the precision of our results was spghtly lower than expected.
We used a cluster samppng method to reduce the design effect and increase the precision of our results.
The design effect can be calculated using statistical software, such as Stata or R.

In Chinese, design effect can be translated as "设计效应" or "设计影响力." Here are some example sentences in Chinese:

我们的研究的设计效应是1.2，表明我们的结果的精确度略低于预期。
我们使用了分层抽样方法来减少设计效应，提高结果的精确度。
可以使用统计软件，如Stata或R，计算设计效应。