Flashcards in Psychology 100 Chapter 4 Deck (295)
What is sensory branding?
Advertising by promoting the product through five senses.
simple stimulation of a sense organ
The organization, identification, and interpretation
of a sensation in order to form a
What takes place when many sensors in
the body convert physical signals from the
environment into encoded neural signals
sent to the central nervous system.
Are sensation and perception the same?
What happens first? Sensation or perception?
What role does the brain play in what we see and hear?
The brain makes sense out of words through perception and concepts
How do sensory receptors communicate with the brain?
By the process of transduction
Methods that measure the strength of a stimulus and the observer's sensitivity to that stimulus
Define absolute threshold
The minimal intensity needed to just barely detect a stimulus in 50% of the trials
Define just noticeable difference (JND)
The minimal change in a stimulus that can just barely be detected
Define Weber's law
The just noticeable difference of a stimulus is a constant proportion despite variations in intensity
Why isn’t it enough for a psychophysicist
to measure only the strength of a stimulus?
Because although two people may both describe their experience of the sunset in the same words, neither of them can directly perceive the other's experience of the same event
What is the simplest quantitative measurement in psychophysics?
As the intensity of the sensory stimulation _____ , we detect the stimulation more _______
As the intensity of the sensory stimulation increase, we detect the stimulation more frequently
Why are some of us able to detect sensory stimulation below our own absolute threshold?
Because some of us are more sensitive than others
Is JND a fixed quantity?
What are two things the just noticeable difference (JND) depend on?
Depends on how intense the stimuli being measure are and on the particular sense being measured
What is the importance of proportion to the measurement of just noticeable difference?
It is important for calculating the difference in threshold
Who created the Weber's law and how?
Fechner created the Weber's law using Weber's insight
Who noticed the relation between the proportion between stimuli when calculating a different threshold?
How accurate and complete are our perceptions of the world?
Our perceptions is somewhat haphazard (careless, random)
What affects our ability to perceive? 1 thing
What affects our ability to sense things? 3 things
Memories, mood and motives
Define signal detection theory
The response to a stimulus depends both on a person's sensitivity to the stimulus in the presence of noise and on a person's response criterion
Define sensory adaptation
Sensitivity to prolonged stimulation tends to decline over time as an organism adapts to current conditions
What happens if the sensory evidence exceeds a person's criterion?
It means that the person has detected the stimulus
What happens if the sensory evidence falls short of a person's criterion?
It means that the person has NOT detected the stimulus
What allows researchers to quantify an observer's response in the presence of noise? 1 thing
Signal detection theory