觀察研究
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觀察研究（英文：observational study）係指由樣本嗰度攞啲描述自變數同應變數嘅數據，並且作出推論，而途中唔會特登嘗試作出任何嘅操作嚟影響啲變數嘅數值。呢類研究喺社會科學上成日用，因為社會科學研究嘅係人－好少可有得好似自然科學噉，能夠吓吓都攞自己啲研究對象入去實驗室裏面任意噉搞[1]。
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