'Psychology of perception', as i think it's called, will probably be a bit too far off topic for most forum dwellers here, but many people have studied cognitive psychology together with computer architecture to pursue artificial intelligence learning algorithms based on human learning behaviours, if that's what you mean. Human emotional states within the context of a human living is basically signals within a feedback control loop. Yeah, i guess there's many parallels between the human system with it's 'signals' and a communications system.