Final Flashcards
(264 cards)
the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment
sensation
the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events
perception
analysis that begins with the sensory receptors and works up to the brains integration of sensory informaition
bottom up processing
As our brain looks at a picture of a flower, it enables our sensory systems to detect the lines, angles and colors that form the flower and leaves
example of bottom up processing
information processing guided by higher level mental processes, as when we construct perceptions drawing on our experience and expectations. We interpret what our senses detect
top down processing
conversion of one form of energy into another
transduction
three steps of transduction
Receive sensory stimulation, often using specialized receptor cells
Transform that stimulation into neural impulses
Deliver the neural information to our brain
the study of relationships betwene the physcial characteristics of stimuli, such as their intensity, and our psychological experience of them
psychophysics
the minimum stimulus energy needed to detect a particular stimulus 50 percent of the time
absolute threshold
when we will detect weak signals
signal detection theory
Lonely, anxious people at speed dating events tend to respond with a low threshold → can be unselective in reaching out to dates
example of signal detection theory
stimuli you cannot detect 50% of the time, below your absolute threshold
subliminal
the activation, often unconsciously, of certain associations, this predisposing ones perception, memory or response
priming
the minimum difference a person can detect between any two stimuli half the time, increases with the size of the stimulus
difference threshold
Parents must detect the sound of their own children’s voice amid other children’s voices
example of difference threshold
for an average person to perceive a difference, two stimuli must differ by a constant minimum percentage
Weber’s law
diminished sensitivity as a consequence of constant stimulation
sensory adaption
what is the benefit of sensory adaption?
Helps us focus on informative changes in our environment without being distracted by background chatter
a set of mental tendencies and assumptions that effects what we hear, taste, feel and see. Through experience we come to expect certain results
perceptual set
Walking destinations look farther away to those who are tired, a hill looks steeper when wearing a heavy backpack
example of the power of emotion
A water bottle seems closer when you are thirsty
examples of the power of motives
Two physical characteristics of light that help us determine our sensory experience
wavelength
intensity
the distance from the peak of one light or sound wave to the peak of the next. Electromagnetic wavelengths vary from the short blips of cosmic rays to the long pulses of radio transmission
wavelength
the dimension of color that is determined by the wavelength of light; what we know as the color names blue, green, and so forth
hue