In anchor-test design, which is also called common-Item nonequivalent groups, tests are presented to two
different groups of testinees. As opposed to equivalent groups design, the groups can be different in their
distribution of abilities. In addition, a series of common items like anchors are included in two tests.
Finally, Common–Person Design: The two tests of be linked are given to two groups of examination, with a
common group of examination taking both tests. Because the testing will be lengthy for the common group. This
design has the same drawbacks as the single-grouph design.