Perception Flashcards
Is everyone the same? why or why not
no, that is the illusion of perception
All mental experiences are _____ and ________ of physical energy.
necessitated; representation
Sensation (definition, occurs where)
-the process by which our sensory receptors and nervous system receives and represent stimulus energy from the environment -occurs in peripheral sensory receptor
Perception (definition, occurs where)
the selection, organization, and interpretation of sensory input
occurs in the brain
sensory info processed in the cortex
* different parts of the cortex processes certain sensory info
Overall generalization of sensation vs perception
Sensation: detect or capture energy/ stimulus energies Perception: interpretation of information from sensation; selects what we are gonna process
to feel/ touch (Sense organ and physical energy)
hand/skin; pressure/temperature changes
smell (Sense organ and physical energy)
nose ; chemical compounds
taste
sense organ and phsycial energy
tongue; chemical compounds
Front lobe processes what sensory info
smell
temporal lobe processes what sensory info
hearing
Parietal lobe processes what sensory info
touch and taste
Occipital lobe processes what sensory info
vision
Sensory receptors definition
specialized cells in our sense organs that detect sensory stimuli and convert them into neural impulses
Transduction
process by which sensory stimuli is analyzed and converted into electrical impulses (action potential); sort of like a translation
How do we study perception?
Psychophysics
Who was the founder for psychophysics?
Gustav Fechner
Psychophysics definiton
the study of the general relationship between physical and perceptual qualities -determines what type of stimuli we can detect and how much (intensity) of that stimuli in order to do so
What did Gustav Fechner discover? what is the definition of it?
Absolute threshold -the minimum level of intensity of a stimulus to be registered by the brain 50% of the time as a sensory event
What did Ernst Weber discover?
1)determines the difference Threshold for stimuli 2)Webers law
Difference threshold (other name; definition )
the difference in physical intensity of a stimulus by adding or substracting to detect a detectable change in sensation 50% of the time
aka Just noticeable difference (JND)
Weber’s law
states that JND in a stimulus is a constant proportion of the magnitude of the original stimulus intensity; the amount of change in a stimulus needed to detect a difference in intensity is given by a CONSTANT RATIO or FRACTION of the original stimulus intensity
