Such a test that measures the same content. There are a number of the same message. Each exam has the same difficulty. There are different classification authority value. With the average and variance mountain together. There is a standard to measure the same and more.
For example, a test that measures the same content. There are an equal number Each item has an equal difficulty. The same discrimination The mean and variance are cool. The standard error of measurement equal and more.
As a test, measured in the same content, and there were an equal test each item are difficult easy rate was different discrimination, the average and variance cool. The standard error of measurement rate and so on.