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.