PSYC 2390 Lecture Notes - Lecture 11: Akinetopsia, Branch Point, Mesopic Vision

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2390
• Professor: Lana Trick

Document Summary

Can be high contrast or low contrast but same spatial frequency. Can be same contrast but diferent spatial frequency. How many bars in a certain space. Dark line w/ white line beside it. Measure on the back of the eye the space that the item covers in terms of degrees (ie. 360 = circle) Thumb at arms length, my thumb covers 2 degrees: how many bars does it cover up? (diagram) Fourier analysis breaking down the image by spatial frequencies and line orientations and contrasts so you can get the basic elements of the image in a way that you don"t have to take up so much space . How to measure sensitivity: method of adjustment using contrast. Stage 1: presenting a faint grading ask participant if it sees it. When they change from no to yes = contrast threshold (diference in contrast when you irst see the bars) C = 4-2 / 4+2 = 2/6 = 0. 33.