Reliability of the test: the degree of reliability and consistency. It is an index that reflects the consistency of test scores under different conditions.
There are four factors that affect reliability:
1. Length of test
2. Test the homogeneity of the population
3. The difficulty of the test
4. Subjective factors of raters
Second, the validity of the test: also known as validity. It is an index that reflects the correctness and accuracy of measurement.
Methods of estimating validity: content validity; Conceptual validity; Standard validity
There are three factors that affect effectiveness:
System error of 1. test
2. The nature of the sample
3. The subjective state of the subjects gives people a rose hand, which is still fragrant for a long time. If it helps you, please click like.