Qualities of Good Test (Usability, Reliability, & Validity)
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The document discusses key qualities of a good test: usability, reliability, and validity. It defines usability as how easy a test is to use, measuring factors like learnability, efficiency, and satisfaction. Reliability refers to how consistently a test measures a characteristic, whether someone would get a similar score by retaking the test. There are different types of reliability. Validity determines how accurately a test measures the intended concept, looking at construct, content, face, and criterion validity.
Qualities of Good Test (Usability, Reliability, & Validity)
- 1. EDUCATIONAL ASSESSMENT Qualities of a Good Test Hina Jalal (Ph.D.) @AksEAina
- 2. Qualities of good test Usability Reliability Validity Hina Jalal (Ph.D.) @AksEAina
- 3. What is Usability? Usability is the method or process we use to determine how easy something is to identify, comprehend, and ultimately use. We measure or rate usability by considering five major attributes, or factors. They are as follows: •Learnability - describes how quickly something can be understood and put to use. •Efficiency - describes how quickly something can be used once understanding is achieved. •Memorability - describes how easily something can be put down, then picked up and used after some time has passed. •Errors - describes how often errors are created during use, and how quickly the user can recover from them. •Satisfaction - describes how pleasing something is to use. Hina Jalal (Ph.D.) @AksEAina
- 4. Reliability refers to how dependably or consistently a test measures a characteristic. If a person takes the test again, will he or she get a similar test score, or a much different score? A test that yields similar scores for a person who repeats the test is said to measure a characteristic reliably. Reliability tells you how consistently a method measures something. When you apply the same method to the same sample under the same conditions, you should get the same results. If not, the method of measurement may be unreliable. Reliability Hina Jalal (Ph.D.) @AksEAina
- 5. Types of Reliability Hina Jalal (Ph.D.) @AksEAina
- 6. Validity tells you how accurately a method measures something. If a method measures what it claims to measure, and the results closely correspond to real-world values, then it can be considered valid. There are four main types of validity: •Construct validity: Does the test measure the concept that it’s intended to measure? •Content validity: Is the test fully representative of what it aims to measure? •Face validity: Does the content of the test appear to be suitable to its aims? •Criterion validity: Do the results correspond to a different test of the same thing? Validity Hina Jalal (Ph.D.) @AksEAina
- 7. Hina Jalal (Ph.D.) @AksEAina
- 8. Hina Jalal (Ph.D.) @AksEAina
- 9. Hina Jalal (Ph.D.) @AksEAina
- 10. Hina Jalal (Ph.D.) @AksEAina