Figure 2
From: Efficiency in redundancy
The 2DDM offers a corrective mechanism that can overcome erroneous decisions. In this example, Response 1 is the correct choice, however, the 1DDM incorrectly ends up at the boundary corresponding to Response 2 (top-panel). In the 2DDM (bottom-panel), one process erroneously crossing the wrong boundary does not necessarily result in an incorrect choice since a response is only triggered once both processes agree.
