 A similar approach has been suggested by physicists David Bohm, Basil Hiley and philosopher Paavo Pylkkänen with the notion that mind and matter both emerge from an "implicate order".The models involve non-commutative mathematics; such models account for situations in which the outcome of two measurements performed one after the other can depend on the order in which they are performed—a pertinent feature for psychological processes, as an experiment performed on a conscious person may influence the outcome of a subsequent experiment by changing the state of mind of that person.The halo effect can be explained through the application of Gestalt theories to social information processing.