Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients
Yıl: 2009 Cilt: 34 Sayı: 152 Sayfa Aralığı: 101 - 112 Metin Dili: Türkçe İndeks Tarihi: 29-07-2022
Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients
Öz: Bu çalışmada, iç tutarlılık kestirimi olarak KR-20 ve Cronbach Alfa güvenirlik katsayılarının yanlış kullanımları gösterilmektedir. Tek boyutluluk sayıtlısı ihlal edildiğinde test puanlarının iç tutarlılık katsayılarındaki farklılaşmaları görmek için iki gerçek veri seti kullanılmıştır: “0-1” puanlama yönteminin kullanıldığı (KR-20) veri seti ve dereceleme yöntemiyle puanlamanın kullanıldığı (alfa) veri seti. Araştırma bulguları, iç tutarlılık katsayılarının hesaplanmasında, tek boyutluluk sağlanmadığı durumlarda bile çok yüksek ama araştırmacıları yanlış yönlendiren KR-20 ve Cronbach’s alfa iç tutarlılık katsayılarının elde edilebileceği göstermiştir. Verilerin gerekli sayıltıları sağlamadığı durumlarda, güvenirliğin bir göstergesi olarak ölçmenin standart hatasının kullanımının da benzer problemlere sebep olduğu gösterilmiştir. Çalışmanın sonunda, bir ölçme aracının iç tutarlık katsayısının rapor edilmesindeki yanlış kullanımlar ve bu yanlış kullanımlardan kaçınma yollarına yönelik olarak öneriler sunulmuştur.
Anahtar Kelime: Konular:
KR-20 ve Cronbach Alfa Katsayılarının Yanlış Kullanımları
Öz: In this study, misuses of KR-20 and Cronbach’s alpha reliability coefficients, used as internal consistency estimates, are illustrated. Two real data sets were used, dichotomously scored, KR-20, data set and polytomously scored, alpha, data set, to see variations in internal consistency coefficients when the unidimensionality assumption is violated. It is shown that a very high, but misleading internal consistency coefficient, KR-20 or alpha, can be obtained even when the unidimensionality assumption is violated. It is also shown that using the standard error of measurement as an indicator of reliability results in similar problems. Finally, misuses and the ways of avoiding those misuses of reporting internal consistency of a scale are suggested and briefly illustrated.
Anahtar Kelime: Konular:
Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
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| IEEE | TAN Ş "Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients." , ss.101 - 112, 2009. |
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| APA | TAN Ş (2009). Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients. Eğitim ve Bilim, 34(152), 101 - 112. |
| Chicago | TAN Şeref Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients. Eğitim ve Bilim 34, no.152 (2009): 101 - 112. |
| MLA | TAN Şeref Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients. Eğitim ve Bilim, vol.34, no.152, 2009, ss.101 - 112. |
| AMA | TAN Ş Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients. Eğitim ve Bilim. 2009; 34(152): 101 - 112. |
| Vancouver | TAN Ş Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients. Eğitim ve Bilim. 2009; 34(152): 101 - 112. |
| IEEE | TAN Ş "Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients." Eğitim ve Bilim, 34, ss.101 - 112, 2009. |
| ISNAD | TAN, Şeref. "Misuses of KR-20 and Cronbach’s Alpha Reliability Coefficients". Eğitim ve Bilim 34/152 (2009), 101-112. |
