A computational vector-map model of neonate saccades: modulating the externality effect through refraction periods.
The present study develops an explicit and predictive computational model of neonate saccades based on the interaction of several simple mechanisms, including the tendency to fixate towards areas of high contrast, and the decay and recovery of a world-centered contrast representation simulating a low-level inhibition of return mechanism. Emergent properties similar to early visual behaviors develop, including the externality effect (or tendency to focus on external then internal features). The age-associated progression of this effect is modulated by the decay period of the model's contrast representation, where the high-level behavior of either scanning broadly or locally is modulated by a single decay parameter.
Jansen
Peter A
PA
Department of Psychology, Neuroscience, and Behavior, McMaster University, Hamilton, ON, Canada. jansenpa@mcmaster.ca
Fiacconi
Chris M
CM
Gibson
Laura C
LC
D000465:Algorithms; D003198:Computer Simulation; D015350:Contrast Sensitivity; D006801:Humans; D007231:Infant, Newborn; D008954:Models, Biological; D012029:Refraction, Ocular / Q000502:physiology*; D012438:Saccades / Q000502:physiology*