AUPSY 263 Lecture Notes - Lecture 9: Change Blindness, Eye Movement

• School: University of Alberta
• Department: Augustana Faculty - Psychology
• Course: AUPSY 263
• Professor: Kathie Bailey

Document Summary

Muller-lyer illusion: arrows pointed outward extend an image whereas arrows pointed inward make it appear shorter >--< People tend not to actively notice the fins (the arrows) but they will respond to the length of the line in a consistent fashion as the fins dictate. Focusing attention elsewhere and we miss changes to a scene. Unattended input are filtered out as unimportant early in the stages of processing. Attention filters out on the basis of physical features. Both attended and unattended channels are processed for meaning and then the things with the highest meaning continue to be processed (attended channel) while things that are deemed of low importance are filtered out (unattended) Attention filters out only after meaning is analyzed. The early-selection hypothesis and the late-selection hypothesis are both true. Unattended stimuli affect perception late selection. Attended and unattended input differ in electrical brain activity early selection. We don"t have the resources to focus on everything.