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Psychology Lecture 25.docx

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University of Toronto Scarborough
Steve Joordens

Psychology Lecture 25 In the spring time, the car driver has the hardest time to see a motorcyclist, particularly because motorcyclists don’t drive during the winter time. The driver has adjusted their vision therefore to look for four wheels, and so do not looking for cyclists because they’re not used to it.  Uses both bottom-up and top-bottom. If you look at something when expecting it, you see the more details to it. Slide 34: Our eyes are constantly in motion, therefore it’s more weird if it stays in one point. The jittering part is part of the muscle and not a psychological issue. Ex: if you look at the white dot, the rest will disappear. That’s because your eye is not built to look at one point only. Slide 35: Vision tells us what’s out there and where they are. At the level of the brain are two pathways- one showing what we’re looking at, and another where it is (including orientation). Damage in the visual system called scotoma, where a black spot is a ‘blind spot’, and they can’t see things in that part. Even so, they still have spatial information at that spot, because the spatial pathway is still working. Slide 36: In baseball, the players are able to comprehend the trajectory and distance of a baseball just using their eyes. When tossing something back and forth, you can easily catch it. However, when you do this while closing one eye, you have trouble because you have lessened the visual input. Slide 37: Your eyes can move for depth perception by moving towards each other (cross-eyed) the closer the subject is to you. There are muscles that work on it and immediately send messages to the brain to inform the distance. This only works with both eyes, since with only one you can’t converge. Convergence indicates closeness. When you look at one thing,
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