Which index for the assessment of the internal reliability of a scale is more statistically sophisticated?
A) Cohen's kappa
B) The split-half coefficient
C) Cronbach's alpha
D) Test-retest coefficient

Question

Quizplus · Accepted Answer

Cronbach's alpha is more statistically sophisticated as it assesses the internal consistency of a scale by taking into account the correlations between all items within the scale, not just the split-half correlation like the split-half coefficient, or only agreement between raters like Cohen's kappa, or the stability of scores over time like the test-retest coefficient.

Which Index for the Assessment of the Internal Reliability of a Scale