便利抽樣

便利抽樣（參照英文：convenience sampling）係一種非隨機抽樣嘅做法，指研究者做抽樣嗰陣唔係隨機做，而係根據方便程度嚟揀選。研究者採用呢種方法，通常係因為人力物力資源有限。例如依家要做經濟學實驗，研究者想睇吓唔同決策規則對投資行為嘅影響，但因為佢哋資源唔夠，冇得攞完全隨機嘅樣本，就直接喺自己間大學招募讀經濟系嘅本科生做參與者，搵到個便利嘅樣本。

便利抽樣往往可以達致快速收集數據，而且仲慳好多人力物力資源，但亦有造成樣本唔夠代表性之虞。^[1]^[2]

利與弊

便利抽樣有好多利弊：

優點: 成本低，方便快捷^[3]; 容易招募參與者^[4]; 適合探索性質嘅研究或者初步試驗
缺點: 樣本可能有偏誤，結果未必可以推廣到其他人群; 缺乏嚴格嘅隨機化程序，統計推論嘅有效度較低

再睇睇

引咗

↑ Government of Canada, Statistics Canada (2021-09-02). "3.2.3 Non-probability sampling". www150.statcan.gc.ca. 喺2024-03-29搵到.
↑ Henry, Gary T. (1990). Practical sampling (第[10. Nachdr.]版). Newbury Park: Sage Publications. ISBN 978-0803929586.
↑ Given, Lisa M., 編 (2008). The Sage encyclopedia of qualitative research methods. Los Angeles, Calif.: Sage Publications. ISBN 978-1-4129-4163-1.
↑ Palinkas, Lawrence A.; Horwitz, Sarah M.; Green, Carla A.; Wisdom, Jennifer P.; Duan, Naihua; Hoagwood, Kimberly (6 November 2013). "Purposeful Sampling for Qualitative Data Collection and Analysis in Mixed Method Implementation Research". Administration and Policy in Mental Health and Mental Health Services Research. 42 (5): 533–544. doi:10.1007/s10488-013-0528-y. PMC 4012002. PMID 24193818.

外拎

（香港繁體）抽樣與代表性，香港中文大學

[statscan-1] Government of Canada, Statistics Canada (2021-09-02). "3.2.3 Non-probability sampling". www150.statcan.gc.ca. 喺2024-03-29搵到.

[2] Henry, Gary T. (1990). Practical sampling (第[10. Nachdr.]版). Newbury Park: Sage Publications. ISBN 978-0803929586.

[3] Given, Lisa M., 編 (2008). The Sage encyclopedia of qualitative research methods. Los Angeles, Calif.: Sage Publications. ISBN 978-1-4129-4163-1.

[4] Palinkas, Lawrence A.; Horwitz, Sarah M.; Green, Carla A.; Wisdom, Jennifer P.; Duan, Naihua; Hoagwood, Kimberly (6 November 2013). "Purposeful Sampling for Qualitative Data Collection and Analysis in Mixed Method Implementation Research". Administration and Policy in Mental Health and Mental Health Services Research. 42 (5): 533–544. doi:10.1007/s10488-013-0528-y. PMC 4012002. PMID 24193818.

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