PSYB51H3 Lecture Notes - Lecture 7: Change Blindness, Extrastriate Cortex, Search Theory
Document Summary
Univariance problem is where you might have a photoreceptor that might itself contribute to colour perception but alone is not colour sensitive because signal is ambiguous. So whatever light enters and stimulates photoreceptor, we don"t know what wavelength it is because any combination of wavelength and light energy can produce any kind of output of this. The solution is that you have more than one colour sensitive photoreceptor (ie red,green and blue cones in retina, the combination of the output of these 3 cones tells us what colour we are looking at) We get visions from 2 sources (eyes) so we have two versions (we have double vision) Selective attention is a cognitive brain mechanism that enables one to process(facilitating mechanism) relevant inputs, thoughts, or actions while ignoring(suppressing) others that are less important, irrelevant or distracting. Arousal: several processes in brain are inhibited during sleep to ignore it, it has to do with arousal.
