Podcast
Questions and Answers
Which of the following is a threat to internal validity?
Which of the following is a threat to internal validity?
What does Cronbach's alpha measure?
What does Cronbach's alpha measure?
Which test is specifically applied when dealing with tests that involve dichotomous response categories?
Which test is specifically applied when dealing with tests that involve dichotomous response categories?
What does external validity concern?
What does external validity concern?
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What does KR-20 assess?
What does KR-20 assess?
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What do higher values of Cronbach's alpha indicate?
What do higher values of Cronbach's alpha indicate?
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Which of the following is a threat to external validity?
Which of the following is a threat to external validity?
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Which type of validity assesses whether a measurement reflects the entire range of the construct being measured?
Which type of validity assesses whether a measurement reflects the entire range of the construct being measured?
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What does face validity assess?
What does face validity assess?
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Which type of validity involves relating an instrument for data collection to a theoretical framework and usually involves hypothesis testing?
Which type of validity involves relating an instrument for data collection to a theoretical framework and usually involves hypothesis testing?
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What does concurrent validity compare the accuracy of a data collection instrument with?
What does concurrent validity compare the accuracy of a data collection instrument with?
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In the development of a mathematics test, what would content validity involve?
In the development of a mathematics test, what would content validity involve?
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What does predictive validity measure?
What does predictive validity measure?
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Which type of validity indicates how well the scale measures the construct it was designed to measure?
Which type of validity indicates how well the scale measures the construct it was designed to measure?
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What is the extent to which a test measures a theoretical construct or trait and attempts to validate a body of theory underlying the measurement and testing of the hypothesized relationships?
What is the extent to which a test measures a theoretical construct or trait and attempts to validate a body of theory underlying the measurement and testing of the hypothesized relationships?
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Study Notes
Threats to Validity
- History, maturation, testing, and instrumentation are threats to internal validity.
- Selection, mortality, and extraneous variables are threats to external validity.
Reliability Measures
- Cronbach's alpha measures the internal consistency of a test or scale.
- Higher values of Cronbach's alpha indicate higher reliability.
- KR-20 assesses the reliability of a test with dichotomous response categories.
Types of Validity
- External validity concerns whether the results can be generalized to other populations and settings.
- Content validity involves ensuring that a test measures the intended construct, e.g., a mathematics test should include relevant mathematical concepts.
- Face validity assesses whether a test appears to measure what it claims to measure.
- Construct validity assesses whether a measurement reflects the entire range of the construct being measured.
- Concurrent validity compares the accuracy of a data collection instrument with a criterion measure at the same time.
- Predictive validity measures how well a test predicts a future outcome or criterion.
Validity and Theory
- Construct validity involves relating an instrument for data collection to a theoretical framework and usually involves hypothesis testing.
- It indicates how well the scale measures the construct it was designed to measure and attempts to validate a body of theory underlying the measurement and testing of the hypothesized relationships.
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Description
Test your understanding of internal and external validity with this quiz. Explore the definitions of internal validity and common threats to it, such as selection bias and testing effects. Then, delve into the concept of external validity and its implications for the generalizability of study findings.