PSY 105 Lecture Notes - Lecture 5: Perception, Auditory Cortex, Thalamus

• School: Ryerson University
• Department: Psychology
• Course: PSY 105
• Professor: Genevieve Quintin

Document Summary

Absolute threshold: smallest amount of stimulus that can be detected. Just noticeable difference (jnd): minimal change in a stimulus that can just barely be detected: amount of stimulus added or taken away to know that there is a. Weber"s law: the just noticeable difference of a stimulus is a constant change in original amount of stimulus proportion despite variations in intensity: amount of stimulus needed to be taken away to notice a. 2% (1/50) needs be taken away from weights to notice a difference. Bottom up processing: the raw sensory data is sent to the brain and your brain sues all of the data to build a perception. Top down processing: you use previously learned information to help recognize and interpret the data coming into your brain: sensory perception, process by which we organize small pieces of sensory experience, gestalt principles into meaningful wholes. Visual information is organized into coherent images.