Educational tests often have a cluster of items linked by a common stimulus ("testlet"). In such a design, the dependencies caused between items are called "testlet effects." In particular, the directional testlet effect (DTE) refers to a recursive influence whereby responses to earlier items can positively or negatively affect…

In the 21st century, the idea that students should have opportunities to develop powerful knowledge has been influential in educational research. Social realism as an educational philosophy, and a focus on knowledge derived from academic disciplines, have been advanced as an alternative to social constructivism and traditionalism as a basis for…