Given below are two statements. Statement I: Reliability is a necessary but…
2020
Given below are two statements.
Statement I: Reliability is a necessary but insufficient condition for validity.
Statement II: In respect of evaluation tools, validity is not an all-or-none concept; it exists as a continuum.
In light of the above statements, choose the most appropriate answer from the options given below:
- A.
Both Statement I and Statement II are true
- B.
Both Statement I and Statement II are false
- C.
Statement I is true but Statement II is false
- D.
Statement I is false but Statement II is true
Attempted by 2 students.
Show answer & explanation
Correct answer: A
The correct answer is option 1: Both Statement I and Statement II are true.
Reliability means consistency of measurement. A tool cannot be valid unless it gives reasonably consistent results, so reliability is necessary for validity. However, reliability is not sufficient: a tool can consistently measure the wrong thing, in which case it is reliable but not valid.
Validity means the extent to which an evaluation tool measures what it is intended to measure. It is not an all-or-none property; it exists in degrees depending on the evidence collected for a particular use, population and interpretation. Therefore, both statements are true.