Models of Information Processing in the Brain
James A. Anderson and Geoffrey E. Hinton · Psychology Press eBooks · 2014
If many computational operations are performed at once, a system can obviously operate faster. However, one part does not know what the other parts are currently doing because the parts operate simultaneously. This causes serious problems of coordination and lateral information transfer from one part of a parallel system to another. These problems have made it hard to program general purpose computers that execute many instructions at once though numerous special purpose systems have been developed for specific tasks.