Chapter 5: Sensation and Perception Flashcards
Sensation
is what happens when our sensory modalities (vision, hearing, taste, etc.) are activated.
Perception
is how we understand these senses.
Bottom up processing
type of information processing based on incoming data from the environment to form a perception
Top down processing
Influences perception.
Selective attention
focused attention
Inattentional Blindness
the failure to notice a fully-visible, but unexpected object because attention was engaged on another task.
Change blindness
he phenomenon that occurs when a person viewing a visual scene apparently fails to detect large changes in the scene. (Gorilla passing by)
Psychophysics
The branch of psychology that deals with the relationships between physical stimuli and sensory.
Absolute Threshold
smallest amount of stimulus that has to present before reaction.
Signal Detection Theory
Patterns
Subliminal
(of a stimulus or mental process) below the threshold of sensation or consciousness; perceived by or affecting someone’s mind without their being aware of it.
Priming
a concept, not a theory in which the activation of one thought may trigger related thoughts
Difference Threshold
“The just noticeable difference”
Weber’s Law
he concept that a just-noticeable difference in a stimulus is proportional to the magnitude of the original stimulus.
Sensory Adaption
occurs when sensory receptors change their sensitivity to the stimulus
Transduction
Transformation of light INPUT into neural messages sent to the brain (occipital lobe)
Wavelength
Distance from one wave peak to the next.
Hue
This determines the HUE, or COLOR we see.
Intensity
Amount of energy in light waves, determines brightness.
Pupil
Light passes through.
Iris
Adjusts how much light is allowed in. Color of the eye.
Lens
Image is projected onto the retina.
Feature Dectectors
Facial recognition
Parallel Processing
Visual “Multi-Tasking”. Ability to recognize different aspects of vision all at once.
Retina
Light passes through the LENS and an image is projected onto the retina.
Accomodation
The lens changes shape.