השוואת שיטות

	אלפא קרונבך סודר	ניתוח מהימנות אורדינלית
תחום	פסיכומטריה	פסיכומטריה
משפחה	Latent structure	Latent structure
שנת המקור	2007	2007
הוגה השיטה	Zumbo, Gadermann, and Zeisser	Bruno D. Zumbo and colleagues
סוג	Internal consistency reliability coefficient	Internal consistency reliability estimation
מקור מכונן	Zumbo, B. D., Gadermann, A. M., & Zeisser, C. (2007). Ordinal versions of coefficients alpha and theta for Likert rating scales. Journal of Modern Applied Statistical Methods, 6(1), 21–29.	Zumbo, B. D., Gadermann, A. M. & Zeisser, C. (2007). Ordinal versions of coefficients alpha and theta as measures of internal consistency for Likert rating scales. Journal of Modern Applied Statistical Methods, 6(1), 21–29.
כינויים	alpha for ordinal data, polychoric alpha, ordinal reliability coefficient, alpha based on polychoric correlations	ordinal alpha, polychoric reliability, reliability for ordinal scales, ORA
קשורות	3	5
תקציר	Ordinal Cronbach's alpha is a reliability coefficient computed from polychoric or polyserial correlations rather than Pearson correlations, making it appropriate for Likert-type and other ordinal item response data. It corrects the systematic downward bias that standard Cronbach's alpha produces when items are treated as continuous but are actually ordinal.	Ordinal reliability analysis estimates the internal consistency of scales whose items are measured on ordered-category (Likert-type) response formats. By basing computations on polychoric correlations rather than Pearson correlations, it corrects for the attenuation that standard Cronbach's alpha produces when responses are discrete and non-normal.