25 JUNE FS Q.5
0. Which of the following statements is true in the case of a test prepared by you as a teacher?
- Option : B
- Explanation : There are four main characteristics of a good
test:
1. Validity
2. Reliability
3. Objectivity
4. Usability
Reliability refers to the consistency of a measure over time (test-retest reliability), across items (internal consistency), and across different researchers (inter-rater reliability).
Validity is the extent to which the test fulfills its purpose, or the scores from a measure represent the variable they are intended to represent.
A test can be reliable without being valid; e.g., a weighing scale will give consistent scores, other conditions being same. However, in case the instrument is malfunctioning, the test will still be reliable if consistent scores are obtained but will not be valid as it may show incorrect weight.
However, if a test is valid, it is definitely reliable; e.g., a class test that is valid or measures what it is intended to measure, will also be reliable as it will give consistent scores, provided other conditions remain unaltered.
By objectivity is meant the degree to which equally competent evaluators obtain the same results. A test is objective when it eliminates the evaluator's bias or prejudice.
By usability is meant the practical value of test with respect to time, cost-effectiveness and administration.
