解讀統計與研究

2013-07-06 11:40:02解讀統計與研究譯者

ICC在SPSS的用法

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使用SPSS計算ICC時會詢問研究者使用哪一種ANOVA模式接下來要選擇consistency或absolute agreement 不同的選擇很可能產生不同的結果而且差異不小

有三種ANOVA模式:

(1)One-way random:只考慮對象效果

(2)Two-way random:同時考慮評分者與對象效果

(3)Two-way mixed:與(2)差在評分者效果限於眼下研究所選之評分者

那麼到底要選擇consistency或absolute agreement?

(1)Consistency: Rater variability沒有放進分母

(2)Absolute agreement: Rater variability有放進分母

s²(b)

ICC =

------------

[1]

s²(b) + s² (w)

Note. (w) within subjects, (b) between subjects.


Shrout and Fleiss six models	Description in SPSS
ICC(1,1)	One-way random single measures
ICC(1,n)	One-way random average measures
ICC(2,1)	Two-way random single measures (Consistency/Absolute agreement)
ICC(2,n)	Two-way random average measures (Consistency/Absolute agreement)
ICC(3,1)	Two-way mixed single measures (Consistency/Absolute agreement)
ICC(3,n)	Two-way mixed average measures (Consistency/Absolute agreement)