Given below are two statements : one is labelled as Assertion (A) and the other is labelled as

Reason (R).

Assertion (A): One psychometrician used Cronbach's alpha to verify reliability of a general knowledge test with answers, in True/False format.

Reason (R); — Cronbach's alpha estimates the internal consistency of a Test.

In the light of the above statements, choose the most appropriate answer from the options given below :

1. ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
2. BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
3. C(A) is correct but (R) is not correct
4. D(A) is not correct but (R) is correct

Pick an option to check yourself, or open the answer below.

Show answer & explanation

Correct answer: A. Both (A) and (R) are correct and (R) is the correct explanation of (A)

Explanation

Cronbach's alpha estimates internal consistency and can be used with dichotomous (true/false) items, where it equals KR-20.