Pregled bibliografske jedinice broj: 737442
A neurocomputational account of mental curve tracing
A neurocomputational account of mental curve tracing // Perception
Alghero, Italija: Pion, 2012. (poster, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 737442 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
A neurocomputational account of mental curve tracing
Autori
Domijan, Dražen
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Perception
/ - : Pion, 2012
Skup
35th European Conference on Visual Perception
Mjesto i datum
Alghero, Italija, 02.09.2012. - 06.09.2012
Vrsta sudjelovanja
Poster
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
Attention; Curve tracing; Neural network model
(pažnja; praćenje konture; neuronski model)
Sažetak
A neural model is proposed whose temporal dynamics simulates the properties of mental curve tracing. Behavioral studies revealed that the tracing is a time consuming process that serially spreads attentional label along the target curve. However, the speed of tracing is not fixed and it could be flexibly adjusted depending on the density of image elements. Single-unit recordings in the monkey primary visual cortex showed that tracing is associated with elevated firing rate for neurons whose receptive field falls on the traced curve. In order to explain behavioral and neurophysiological findings, the proposed model implements a novel form of neural filling-in that enables activity spreading along the target curve. Filling-in occurs at multiple spatial scales in order to account for different speeds of tracing. The model implements object-level competition and selection among distinct image elements. Computer simulations showed that the model exhibits appropriate scaling of tracing speed with distance between curves thus simulating the hot spots of attention. The speed of tracing slows down when the curves are close to each other and speeds up when they are far apart. Furthermore, the model is able to store the traced pattern in short-term memory.
Izvorni jezik
Engleski
Znanstvena područja
Psihologija
POVEZANOST RADA
Projekti:
009-0362214-0818 - Neuronsko modeliranje i bihevioralno testiranje vidne percepcije i kognicije (Domijan, Dražen, MZOS ) ( CroRIS)
Ustanove:
Filozofski fakultet, Rijeka
Profili:
Dražen Domijan
(autor)