Sensation and Perception: Lecture 9 Flashcards
Does transduction relate to sensation or perception?
Transduction represents the first step toward perception and is a translation process where different types of cells react to stimuli creating a signal processed by the central nervous system resulting in what we experience as a sensations.
What is the just noticeable difference
the lowest level of stimulation needed for a person to detect a stimulus.
How does just noticeable difference relate to absolute threshold
Absolute threshold: the minimum level of stimulation that a person can detect a difference in a stimulus 50% of the time.
JND: the lowest level of stimulation needed for a person to detect a stimulus.
What is sensory adaptation?
how an observer becomes less sensitive to a stimulus over time
What is signal detection theory?
a theory predicting how and when we detect the presence of a faint stimulus (“signal”) amid background stimulation (“noise”)
What are the five typical senses?
Vision, Audition, Olfaction, Gustation, Somato-sensation
What are the 5 additional senses?
temperature, Kinaesthesia, Balance, Pain, Proprioception
What is transduction?
turning a physical stimulus into an action potential
What is an example of a physical stimulus?
taste, sound etc
How does sensation start?
Transduction
What is the definition of sensation?
stimulation of a sense organ
What is absolute threshold? What does it look at?
The level of a stimulus at which the stimulus can be detected 50% of times it is presented.
What determines whether or not a stimulus is detected?
contextually bound like the 2 balls in different environments
Is it possible for transduction to happen without consciously experiencing the signal
Yes
What is subliminal messaging
When transduction happens, but no conscious processing.
