Negative ICC(1) value

chienhsin

以下段落出自
; P# _; e( B- v+ qKlein, Katherine J. (Ed); Kozlowski, Steve W. J. (Ed), (2000). Multilevel theory, research, and methods in organizations: Foundations, extensions, and new directions, (pp. 349-381). San Francisco, CA, US: Jossey-Bass, xxix, 605 pp.                        

之  第八章    Within-group agreement, non-independence, and reliability: Implications for data aggregation and analysis.  作者 Bliese, Paul D.                        
) f/ F  |( t0 @7 j( q3 W# U( G第355頁

裡面的value是指ICC(1)的值，原文如下：

Negative values occur in the ANOVA model when the within-group variance is smaller than the between-group variance (that is, when MSB is smaller than MSW).


我想問的是，這是對的嗎？   

' a# k& Q! w' `3 {& h如果  組內變異<組間變異，ICC(1)的值應該是正值才對。
但括號內卻又解釋 MSB < MSW?
1 e$ }$ D, |! J5 f

Kenneth

回复 1楼 chienhsin 的帖子
chienhsin, 我想应该是手误吧。他一面说“within-group variance is smaller than between-group variance”，然后又解释(作者用了“that is”)为“MSB is smaller than MSW.” 其中肯定有一个是错的。因为within group variance 就是 MSW；between group variance 就是  MSB。
- q. ^4 s/ D7 M, Z: ~5 d" g3 vICC(1) 的方程的分母是（MSB-MSW）,所以括号内的解释才是对的。