Derginin Adı: Eğitimde ve Psikolojide Ölçme ve Değerlendirme Dergisi
Cilt: 2012/3
Sayı: 1
Makale Başlık: A Cross-National Comparison of Intra-Class Correlation
Makale Alternatif Dilde Başlık: Alternatif dilde başlık bulunmamaktadır. There is no article title in another language.)
Makale Eklenme Tarihi: 25.2.2015
Okunma Sayısı: 2
Makale Özeti: The plausible range of intra-class correlation coefficient (ICC) is essential for both a priori sample size calculations in planning cluster-randomized trials and statistical adjustments of misaligned analysis of clustered data in meta-analytic studies. Recent efforts to create databases for ICC in educational achievement outcomes are based on the studies published only in the US and Europe. The current study aims to extend the existing information for the plausible range of ICC values in educational achievement outcomes to a global scale by examining the distributional characteristics of two-level unconditional ICC estimates across countries participating in two international studies, TIMSS and PIRLS. The findings suggest large variability in the unconditional ICC estimates across countries, and current standards do not apply to every country. Researchers should look for country-specific ICC estimates in planning cluster-randomized trials and in comparing studies across countries.
Alternatif Dilde Özet: Alternatif dilde abstract bulunmamaktadır. (There is no abstract in another language.)

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