PSY100Y5 Lecture : psych lec 4.docx
13
PSY100Y5 Full Course Notes
Verified Note
13 documents
Document Summary
Sensation is the stimulation of sense organs: how we take energy from world and convert into neural impulses, the same for all of us: how we take info from world eyes/sound. As soon as we see something, we change it. We should be able to see candle flame 50 km away Tick of watch 6m away taste tsp of sugar Sensory receptors are tuned to a particular form of energy. Auditory receptors in the ear code for sound pressure changes, not for light. Sensory systems require a minimum amount of energy for activation (absolute threshold) Absolute threshold: arbitrary standardized: minimum amount of stimulation necessary to detect object 50% of the time. Just-noticeable difference (jnd): the minimum difference in stimulation that is just noticeable. When 0 intensity to stimulus, any addition makes difference. But when already have intensity, doesn"t make diff.
