PSYC 2000 Chapter : Ch 4- Sensation And Perception
Document Summary
Perception= when we select, organize, and interpret our sensations: transduction: Other internal senses: pain (organ- stomach pain, head ache, etc: thresholds: Absolute threshold: minimum stimulation needed to detect a particular stimulus 50% of the time. Detection > intensity (ex. off light bulb, dim, bright, brighter, brightest) absolute threshold is when you see the light of the light bulb . Difference threshold: minimum difference between two stimuli required for detection 50% of the time, also called just noticeable difference (jnd). Weber"s law= in humans, different thresholds (experienced as a just noticeable different) increase in proportion to the size of the stimulus. Light bulb set to 100 , experimenter increases intensity, observer sees light when it hits 108 , this the observer"s difference threshold is. Subliminal stimuli are those just strong enough for our sensory receptors to pic them up, but not strong enough for us to be able to detect them.
