Kappa Measurement of Inter-observer Agreement: Scott's Kappa, °üÂûÀÚ°£ ÀÏÄ¡µµ Ä«ÆÄ ÃøÁ¤: ScottÀÇ Ä«ÆÄ

g1 = a + b
g2 = c + d
f1 = a + c
f2 = b + d
P_Observed = (a + d) / N
P_Expected = ( sq(f1 + g1) + sq(f2 + g2) ) / ( 4 * sq(N) )
Kappa = ( P_Observed - P_Expected ) / ( 1 - P_Expected )

ÀԷ°ª:


°üÂûÀÚ 1

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°üÂûÀÚ 2    ¿¹  a:   b: 
¾Æ´Ï¿À  c:   d: 

°á°ú°ª:

N
P_Observed
P_Expected
Kappa
 
Decimal Precision:


Result Ranger® for ÀÏÄ¡ÀÇ °­µµ: Scott's Kappa

°üÂûÀÚ°£ ÀÏÄ¡µµ¸¦ º¸´Â Ä«ÆÄ ÃøÁ¤°ªÀº ¿ì¿¬È÷ ¹ß»ýÇÒ ¼ö ÀÖ´Â ÀÏÄ¡µµÀÇ Á¤µµ¸¦ ±³Á¤Çϰųª º¸»óÇÕ´Ï´Ù. CohenÀÇ Ä«ÆÄ°¡ ¾Æ¸¶µµ °¡Àå ÈçÈ÷ »ç¿ëµÇ´Â °è»êÀ̰ڽÀ´Ï´Ù¸¸, ¾Æ·¡¿¡ ÀÖ´Â Byrt µîÀÇ ³í¹®Àº ScottÀÇ ¹æ¹ýÀ» Æ÷ÇÔÇÏ¿© ´Ù¾çÇÑ ´Ù¸¥ °è»ê¹æ¹ýÀ» °ËÅäÇϰí ÀÖ½À´Ï´Ù.

ScottÀÇ Ä«ÆÄ´Â ¶ÇÇÑ Æí°ßÀ» ±³Á¤ÇÑ Ä«ÆÄ(Bias Adjusted Kappa)·Î ¾Ë·ÁÁ® ÀÖ½À´Ï´Ù (BAK or Pi).

ÀԷº¯¼ö´Â °üÂûÀÚµéÀÌ È®½ÇÈ÷ µ¿ÀÇÇϰųª(input A), ȤÀº µ¿ÀÇÇÏÁö ¾Ê°Å³ª(input B), ȤÀº °¡´ÉÇÑ µÎ°¡Áö Á¶ÇÕÀÇ µ¿ÀÇÇÏÁö ¾ÊÀ½(input B¿Í C)À» ÀǹÌÇÕ´Ï´Ù


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MedCalc CrossRef: Kappa Multicalc Page

Cohen JA, A coefficient of agreement for nominal scales, Educ Psych Meas, 1960; 20:37-46

Cicchetti DV, Feinstein AR, High agreement but low kappa: II. Resolving the paradoxes, J Clin Epidemiol, 1990;43(6):551-558

Scott WA, Reliability of content analysis: The case of nominal scale coding, Public Opinion Q, 1955; 19:321-325

Byrt T, Bishop J, Carlin JB, Bias, prevalence and kappa, J Clin Epidem, 1993; v46 #5, 423-429


 


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