A nurse researcher would want to use a Kuder-Richardson (KR-20) coefficient to establish the internal consistency of an instrument in which case?
a. When questions are open-ended
b. When multiple choice tests are analyzed
c. When the instrument uses a Likert-type response scale
d. When the instrument is designed to measure more than one concept
ANS: B
Feedback
A Open-ended questions elicit textual data that are content analyzed (qualitative analysis).
B The KR-20 coefficient provides estimates of homogeneity used for instruments that have a dichotomous response format.
C Cronbach's alpha coefficient provides estimates of homogeneity when instruments are scaled with ordinal responses.
D The KR-20 coefficient does not apply to this answer.
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