?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Evolving+modular+architectures+for+neural+networks&rft.creator=Di+Ferdinando%2C+Andrea&rft.creator=Calabretta%2C+Raffaele&rft.creator=Parisi%2C+Domenico&rft.subject=Evolution&rft.subject=Cognitive+Psychology&rft.subject=Computational+Neuroscience&rft.subject=Neural+Nets&rft.description=Neural+networks+that+learn+the+What+and+Where+task+perform+better+if+they+possess+a+modular+architecture+for+separately+processing+the+identity+and+spatial+location+of+objects.+In+previous+simulations+the+modular+architecture+either+was+hardwired+or+it+developed+during+an+individual's+life+based+on+a+preference+for+short+connections+given+a+set+of+hardwired+unit+locations.+We+present+two+sets+of+simulations+in+which+the+network+architecture+is+genetically+inherited+and+it+evolves+in+a+population+of+neural+networks+in+two+different+conditions%3A+(1)+both+the+architecture+and+the+connection+weights+evolve%3B+(2)+the+network+architecture+is+inherited+and+it+evolves+but+the+connection+weights+are+learned+during+life.+The+best+results+are+obtained+in+condition+(2).+Condition+(1)+gives+unsatisfactory+results+because+(a)+adapted+sets+of+weights+can+suddenly+become+maladaptive+if+the+architecture+changes%2C+(b)+evolution+fails+to+properly+assign+computational+resources+(hidden+units)+to+the+two+tasks%2C+(c)+genetic+linkage+between+sets+of+weights+for+different+modules+can+result+in+a+favourable+mutation+in+one+set+of+weights+being+accompanied+by+an+unfavourable+mutation+in+another+set+of+weights.%0A%0A%0A%0A&rft.publisher=Springer+Verlag&rft.contributor=French%2C+Robert&rft.contributor=Sougn%C3%A9%2C+Jacques&rft.date=2001&rft.type=Conference+Paper&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F1298%2F3%2Fevolmod.pdf&rft.identifier=++Di+Ferdinando%2C+Andrea+and+Calabretta%2C+Raffaele+and+Parisi%2C+Domenico++(2001)+Evolving+modular+architectures+for+neural+networks.++%5BConference+Paper%5D++++(In+Press)++&rft.relation=http%3A%2F%2Fcogprints.org%2F1298%2F