Reliability estimation methods – UGC NET Question

Statements A, B, C, D and F correctly describe methods and interpretations related to reliability, while E is wrong. Statement A is true since test–retest uses repeated administration, and statement B is correct about split-half correlations. Statement C rightly applies inter-rater reliability to multiple observers, and statement D accurately mentions Cronbach’s alpha for internal consistency. Statement F is also true because extremely high reliability can suggest redundancy, whereas E is false as reliability alone cannot guarantee validity beyond doubt.

Option A:
Option A lists A and E as wrong, but A is actually a correct description of the test–retest method. Misclassifying a true statement as wrong and combining it with E leads to an incorrect set. Therefore this option is invalid.

Option B:
Option B extends the error by also including B, which is a correct statement about split-half reliability. Treating both A and B as wrong indicates a misunderstanding of standard reliability methods, so this combination cannot be accepted.

Option C:
Option C incorrectly includes A and F along with E in the wrong set. Both A and F are accurate: A describes the repeated administration approach, and F notes the possibility of over-homogeneity. Mixing these true statements with the false E makes the option unsound.

Option D:
Option D correctly singles out E as the only wrong statement. It acknowledges that while reliability indices are important, they do not alone establish validity conclusively. Since it leaves all the true statements intact and isolates the incorrect one, this option is the correct answer.