PSYC 1010 Lecture Notes - Lecture 4: Detection Theory, Subliminal Stimuli, Visible Spectrum

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: R G

Document Summary

Sensation: energy sources impinging our nervous system on our sensory organs . Help know the nature of the world. Slide 2 what is the shortest distance from a to b. Slide 3 artist informed that it was the manhattan skyline. Slide 4 we create images in our head. Artist is a picture window, and person wearing argil stockings. Perception is a selective interpretation of our sensory input from the environment. Thresholds: defined in terms of probability of responding. Perception of seeing light changes depending on whether you are tired, angry etc. mood. Absolute threshold is defined as the intensity level at which the probability of detection is 50% Weber"s law- jnd just noticeable differences- the constant proportion of the original stimulus. You could notice the difference of 1/30 portion of the other stimulus. 1/30 difference for you to notice the difference. Psychophysical scaling (fechner"s law)- the magnitude of sensory experience is proportion to the number of jnd .