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實驗組同對照組

實驗組experimental group / treatment group)同對照組control group)係科學實驗上嘅受試者分組。

  • 實驗組指接受咗實驗操作(experimental manipulation)嘅受試者,
  • 而對照組就指冇受實驗操作嘅受試者。

研究者會對比實驗組同對照組,睇吓兩組受試者喺個應變數上係咪有分別;如果有,噉就表示個實驗操作真係有效。

舉個例說明,想像有個研究者,佢想研究一隻新藥(自變數)係咪能夠提升人嘅專注力(應變數),於是佢就搵咗若干個受試者返嚟,將佢哋分做兩組,實驗組俾佢哋試隻藥,而對照組就食一隻已知唔會影響專注力嘅藥(安慰劑),然後俾兩組受試者做一啲要求專注力嘅作業(假設有咗明確方法量度專注力),比較兩組喺專注力上嘅表現係咪有分別,如果有,就表示隻藥真係有效[1]

涉及嘅統計分析

[編輯]

睇埋

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[編輯]
  1. Hinkelmann, Klaus; Kempthorne, Oscar (2008). Design and Analysis of Experiments, Volume I: Introduction to Experimental Design (2nd ed.). Wiley.
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實驗組同對照組
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