Operationalization - Validity
3 important questions on Operationalization - Validity
What do external and internal validity mean and how does it differ from content, construct and criterion validity?
Internal validity; Is the cause and effect trust worthy; between the treatment and outcomes; design and results.
It differs from content and criterion validity in such a way that the first two say something about the validity of the results. The latter say something about the validity within the research.
We can further distinguish construct validity into converging and discriminant validity. What is the difference between those two?
Discriminant validity means that the correlation between two DIFFERENT concepts measured must be LOW.
We can further distinguish criterion validity into competitive and predictive validity. What is the difference between those?
Predictive validity means that a measurement instrument is predictively valid if it predicts the scores on a criterion variable that lies in the FUTURE.
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