PSY 1101 Lecture Notes - Lecture 6: Optic Chiasm, Optic Nerve, Color Vision

• School: University of Ottawa
• Department: Psychology
• Course: PSY 1101
• Professor: Mark Dallas

Document Summary

Reversing an image change in what you"re sensing and perceiving. Perceiving: how we make sense of that data: our sensory and perceptual processes help us sort out what"s going on in this complex figure. Bottom- up processing: sensory receptors relay information to the brain, the brain interprets this information. Top-down processing: precious experience and expectations affect the detection and analysis of information from the visual senses, explains visual illusions. Where previous knowledge and experience counters bottom-up signals from the senses. Sensory information is cancelled by prior knowledge and experience. We use visual illusions to figure out the cognitive structure. Habituation: the perceptions of change disappear, even though the sensations are still there putting a book on lap or pencil behind ear. If there"s a difference between 2 inputs, can we detect the difference: 2 ways to measure thresholds. Absolute: ability to detect a stimulus 50% of the time. Minimum stimulus necessary to detect a stimulus half the time.