Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Qualities of a Good Research Instrument
Transcript of Qualities of a Good Research Instrument
Methods in Testing the Reliability of a Good Research Instrument
means the extent to which a research instrument is dependable, consistent, and stable (Meriam, 1975).
3 Qualities of a Good Research Instrument:
1. Validity –
means the degree to which a test or measuring instrument measures what it intends to measure.
Types of Validity
means the extent to which the content or topic of the test is truly representative of the content of the course.
is the degree to which the test agrees or correlates with a criterion set up as an acceptable measure.
is the extent to which the test measures a theoretical construct or trait.
as described by Aquino and Garcia (1974), is determined by showing how well predictions made from the test are confirmed by evidence gathered at some subsequent time.
the same instrument is administered twice to same group of subjects and the correlation coefficient is determined.
administered to the group of subjects, and the paired observations correlated. In estimating reliability by the administration of parallel or equivalent forms of a test, criteria parallelism is required. 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.
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. The two halves of the test must be similar but not identical in content, number of items, difficulty, means and standard deviations.
is used with psychological tests which consist of dichotomously scored items.