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QUALITIES
OF
A
GOOD RESEARCH
INSTRUMENT
The test agrees with itself. It is concerned with
the consistency of responses from moment to
moment. Even if a person takes the same test
twice, the test yields the same results. However, a
reliable test may not always be valid.
Reliability
Test-retest method
The same research instrument is
administered twice to the same group of
subjects and the correlation coefficient
determined
Spearman rank correlation of coefficient
or Spearman rho
is a static used to measure the
relationship between paired ranks
assigned to individual scores on two
variables
Parallel or equivalent forms of test
The two forms of the test must be constructed
so that the content, type of item, difficulty,
instructions for administration, and many
others, are similar but not identical.
Split - Half method
The test in this method may be administered
once, but the test items are divided into two
halves. The common procedure is to divide a
test into odd and even items.
Internal consistency method
This method used with psychological test
which consist of dichotomously scored
items.
Usability
means the degree to which the research
instrument can be satisfactorily used by
teachers, researchers, supervisors and school
managers without undue expenditure of time,
money, and effort, I other words, usability
means practicability.
Factors that determine usability
Ease of administration
Ease of scoring
Ease of interpretation and application
Low cost
And proper mechanical make up.

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Qualities of a good research instrument.. MTE 601.pptx

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  • 10. The test agrees with itself. It is concerned with the consistency of responses from moment to moment. Even if a person takes the same test twice, the test yields the same results. However, a reliable test may not always be valid. Reliability
  • 11. Test-retest method The same research instrument is administered twice to the same group of subjects and the correlation coefficient determined
  • 12. Spearman rank correlation of coefficient or Spearman rho is a static used to measure the relationship between paired ranks assigned to individual scores on two variables
  • 13. Parallel or equivalent forms of test The two forms of the test must be constructed so that the content, type of item, difficulty, instructions for administration, and many others, are similar but not identical.
  • 14. Split - Half method The test in this method may be administered once, but the test items are divided into two halves. The common procedure is to divide a test into odd and even items.
  • 15. Internal consistency method This method used with psychological test which consist of dichotomously scored items.
  • 16. Usability means the degree to which the research instrument can be satisfactorily used by teachers, researchers, supervisors and school managers without undue expenditure of time, money, and effort, I other words, usability means practicability.
  • 17. Factors that determine usability Ease of administration Ease of scoring Ease of interpretation and application Low cost And proper mechanical make up.