PSYC 212 Lecture Notes - Lecture 12: Simple Features, Narrow Street, Change Blindness

• School: McGill University
• Department: Psychology
• Course: PSYC 212
• Professor: Mathieu Roy

Document Summary

Psyc 212 lecture 12 february 22nd. Attention and awareness ii/ audition 1: sound and hearing. Perceiving and understanding scenes: we need our selective pathway to clearly perceive objects. This is where we use our attention, where stimuli go through the attentional bottleneck, where features are bound together, and we(cid:859)(cid:396)e a(cid:271)le to pe(cid:396)(cid:272)ei(cid:448)e spe(cid:272)ifi(cid:272) o(cid:271)je(cid:272)ts (cid:894)e. g. fi(cid:374)di(cid:374)g the fau(cid:272)et i(cid:374) the kitchen). However, understanding this scene also helps us guide our attention. Perceiving these types of scenes happe(cid:374)s (cid:448)e(cid:396)y (cid:395)ui(cid:272)kly, a(cid:374)d (cid:449)e do(cid:374)(cid:859)t (cid:374)eed atte(cid:374)tio(cid:374) to perceive them. If we ask people to categorize different scenes as being natural (outdoor versus urban), it can take them as little as 19ms (cid:449)e(cid:859)(cid:396)e (cid:448)e(cid:396)y good at pe(cid:396)(cid:272)ei(cid:448)i(cid:374)g differences between these two types of scenes. For most scenes (e. g. lake versus desert, et(cid:272). (cid:895), it takes us (cid:374)o (cid:373)o(cid:396)e tha(cid:374) 5(cid:1004)(cid:373)s to k(cid:374)o(cid:449) (cid:449)hat (cid:449)e(cid:859)(cid:396)e looki(cid:374)g at. This is puzzli(cid:374)g because recognizing simple objects (e. g. an oven) takes us ~20-50ms.