Judy wants to estimate the internal consistency of a survey on which the respondent marks (1) Not at all, (2) Sometimes, (3) Most of the time, or (4) Always. Which one of the following is most appropriate for her to use?
A) Spearman Brown
B) coefficient alpha
C) Cohen's kappa
D) KR-20

Question

Quizplus · Accepted Answer

Coefficient alpha is the most appropriate choice for estimating internal consistency of a survey that includes items with Likert-type responses. This coefficient measures how well the items within the survey are related to each other and can indicate the reliability of the survey as a whole. Spearman Brown and KR-20 are alternative methods for estimating reliability, but do not take into account the specific characteristics of surveys with Likert-type responses. Cohen's kappa is used to measure inter-rater agreement and is not appropriate for this situation.

Judy Wants to Estimate the Internal Consistency of a Survey