體驗區
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| 篇名 |
影響積差相關係數與α信度係數之因素
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| 並列篇名 |
Factors Affect Pearson Correlation and Coefficient Alpha
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| 作者 |
傅粹馨(Fu, Tsuey-shing)
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| 中文摘要 |
在教育研究中，相關係數(r)之使用相當頻繁；而編製測驗過程中，α信度係數亦扮演著重要的角色，故本文探討的二個主題包括； (一 ) 影響積差相關係數的因素；(二 )影響α信度係的因素。 影響積差相關係數之因素部分，內容包括五項：(一 )r 之基本假設；線性相關，分配相似性與等分散性；(二 ) 形成假性相關的原因； (三 ) 影響 r 之因素有四：線性；二變項之分配情形；二變項分數之測量誤差與團體之變異量；(四 ) 不會影響r 之因素：變數之線性轉換；(五 )r 之四個特例：φ相關；點二系列相關； 二系列相關和斯皮爾曼等級相關。 影響α信度係數之因素部分，內容包括五項：(一 ) 信度之定義；(二) α係數的意義與特性； (三 ) 內部一致性單一向度與 (四 ) α係數之計算；(五 ) 影響α係數之因素：受試之同質或異質；測驗之長度；題目間之相關；以及試題難度之同質性。
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| 英文摘要 |
Pearson correlation (r) is employed frequently in educational researchand Cronbach's coefficient alpha( α ) plays animportant role in testconstruction. Two topics were investigated in the article: factors affectPearson r and coefficient alpha. Four issues were included in the part offactors affect r: first, the assumptions under r: linear relationship betweenvariables, similar distribution, and homoscadasticity; second, spuriouscorrelation; third, factors affect r: linearity, distribution of variables,error of measurement, and restriction in range; fourth, factors do not affect r:linear transformation of variables; and fifth, special cases of r: phicorrelation, point-biserial correlation, biserial correlation, and Spearman rankcorrelation. Five issues were discussed in the part of factors affect alpha:first, the definition of reliability; second, the meaning and characteristics ofreliability; third, internal consistency and dimensionality; fourth, thecalculation of coefficient alpha; and fifth, factors affect coefficient alphaincluding: homogeneity or heterogeneity of subjects, the length of a test,interitem correlation, and homegeneity of item difficulty.
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| 頁次 |
193-206
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| 關鍵詞 |
TSSCI
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| 卷期 |
14
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| 日期 |
199806
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| 刊名 |
教育學刊
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| 出版單位 |
國立高雄師範大學教育學系
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