With what instrument could the predictive validity of a metric scale (a set of questions)best be determined?
A)Cronbach's alpha.
B)A correlation-coefficient.
C)Fisher's r-to-z test.
D)With none of the above mentioned instruments.

Question

Quizplus · Accepted Answer

The best instrument to determine the predictive validity of a metric scale is a correlation-coefficient. This helps to determine the relationship between the metric scale and the outcome it is being used to predict. A high correlation coefficient indicates a strong predictive validity, while a low coefficient suggests weak predictive validity.

With What Instrument Could the Predictive Validity of a Metric