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1、整合過去所累積知識,使我們能在研究之前學習他人研究成果
2、在他人研究成果之上,建立自己研究假設
3、比較、複製(學習、截長補短)
、批評
此實驗有成熟之內部效度威脅,因為有些使用者可能很積極的使用此數位學習系
統,有些則是採用消極的態度。
有可能,試驗之內部效度威脅方面有可能實測者是經由自己補習或者是出國遊學
等方式讓自己的英文成長
,
而不是透過數位學習系統
。
衡量工具包含考試的內容,
難度是否一致,以及施測人員、場地、時間都會影響。
(1)應保留鑑別力(2)進行信、效度分析

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