purposive sampling

简明释义

有意抽样法

英英释义

例句

1.In this research, we utilized purposive sampling to select participants who had experience in the field.

在这项研究中，我们使用了目的抽样来选择在该领域有经验的参与者。

2.The team decided that purposive sampling was the best method to gather insights from experts.

团队决定目的抽样是从专家那里收集见解的最佳方法。

3.For the study on consumer behavior, purposive sampling helped us target specific demographics.

在关于消费者行为的研究中，目的抽样帮助我们针对特定的人口统计。

4.By employing purposive sampling, we ensured that our sample included diverse viewpoints.

通过采用目的抽样，我们确保我们的样本包括多样的观点。

5.The researchers used purposive sampling to focus on individuals with specific health conditions.

研究人员使用目的抽样来关注具有特定健康状况的个体。

作文

In the realm of research, the choice of sampling method can significantly influence the quality and relevance of the findings. One common approach is known as purposive sampling, which is a non-probability sampling technique where researchers select participants based on specific characteristics or criteria that align with the goals of their study. This method is particularly useful when the researcher aims to gain insights from a particular subgroup or when the population is too small to warrant random sampling. For instance, if a study aims to understand the experiences of cancer survivors, the researcher would intentionally select individuals who have survived cancer rather than randomly sampling from the general population. This ensures that the data collected is rich and relevant to the research questions posed.The strength of purposive sampling lies in its ability to provide detailed and focused information. By targeting individuals who possess certain traits or experiences, researchers can delve deeper into specific issues, leading to more nuanced findings. For example, in qualitative research, where understanding the depth of human experience is crucial, this sampling method allows for the exploration of complex emotions and perspectives that might not emerge through broader sampling methods.However, it is important to recognize the limitations of purposive sampling. Since the selection of participants is subjective, there is a potential for bias, which may affect the generalizability of the results. Researchers must be cautious and transparent about their criteria for selection to mitigate these biases. Additionally, because this method does not utilize randomization, the findings may not be representative of the larger population, which can limit the applicability of the research conclusions.In practice, purposive sampling can take various forms, including homogeneous sampling, where participants share similar characteristics, or maximum variation sampling, where a wide range of perspectives is sought. The choice of approach depends on the research objectives and the nature of the study. For instance, a researcher studying educational practices may choose to use homogeneous sampling to focus on a specific teaching method among experienced educators, while another researcher investigating diverse student experiences might opt for maximum variation sampling to capture a broader range of insights.Ultimately, purposive sampling serves as a valuable tool in the researcher's arsenal, enabling them to gather targeted information that can lead to significant discoveries. When used thoughtfully and in conjunction with other methods, it can enhance the depth and richness of research findings. As researchers continue to explore various phenomena, understanding and effectively utilizing purposive sampling will remain an essential skill in the pursuit of knowledge.In conclusion, purposive sampling is a strategic approach that allows researchers to focus on specific groups and gather meaningful data that aligns with their study's objectives. While it presents challenges related to bias and generalizability, its strengths in providing detailed insights make it an indispensable method in qualitative research. By mastering this technique, researchers can contribute to a deeper understanding of complex issues within their fields of study.

目的性抽样是一种非概率抽样技术，研究者根据特定的特征或标准选择参与者，以符合他们研究的目标。