PSYC 181 Lecture Notes - Lecture 6: Emotional Contagion, Ames Room, Tinnitus
Document Summary
Sensation-process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment: the brain receives input from sensory organs. Perception-the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events: the brain makes sense out of the input from sensory organs. Bottom up processing-taking in sensory info and assembling it: hearing a noise, knowing what it is. Top down processing-using models, ideas, and expectations to interpret sensory information. From sensory organs to the brain: reception-stimulation of sensory receptor cells, transduction-transforming this cell stimulation into neural impulses, transmission-delivering this neural information to the brain to be processed. Absolute threshold-the minimum level of stimulus intensity needed to detect a stimulus: anything below threshold considered subliminal . Signal detection theory-whether or not we detect stimulus, especially amongst background noise: depends on intensity of stimulus and on psychological factors. 0. 3 percent of sound wave frequency to notice a difference in pitch.
