Discussion
What is the relation between coefficient alpha and coefficient of precision when a composite test is made up of non-parallel subtests ?
Answer: B
The relation is coefficient alpha ≤ coefficient of precision.
Coefficient alpha equals the true reliability (precision) of a composite only when its parts are parallel or at least essentially tau-equivalent. When the subtests are not parallel, alpha underestimates reliability; it is a lower bound to the coefficient of precision.
So alpha can equal the precision only in the special parallel case and is otherwise smaller; it is never larger, which rules out the greater-than-or-equal option, and 'equal' and 'approximately equal' hold only for parallel parts.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development