Perception Flashcards
(30 cards)
Transduction
conversion of stimulus from one form to another
Transducer
Converts energy from the world into electrical energy, like ‘touch receptor’
What converts photons into electctrochemical to vision
Photoreceptor
What converts movement into electrochemical –> to hearing and touch
mechanoreceptors
What converts molecules into electrochemical –> to smell and taste
chemosensor
Electricity is…
movement of ions
Which transducers transduce light?
Rods and Cons
When perception answers the questions of length, distance, magnitude, temperature… it’s called?
Magnitude estimation
What are percpetions equipment used in outer psychophysics?
Magnitude estimation, diffrences, stimulus detection.
Exploring the relationship of what we observe and what we perceive is called:
Psychophysics
Exploring how we translate the world into sensory data is called:
Outerpsychophysics.
Steven’s power law?
as the stimulus strengthens in magnitude a perception/senstion of it increases proportionally.
Absolute threshold
Lowest amount of stimulus required for detection / look at examples lecture 2?
Signal detection theory, and what it causes
People have a reaction threshold, evaluation takes into account sensory evidence, costs of false alarm, benefit of correct evaluation. DETECTION can involve a decision component.
Just noticeable difference
smallest difference between two stimuli that people can perceive 50% of the time.
Absolute difference
unavoidable to detect?
the just noticeable difference increases as the level of stimuli increases is?
Webber’s law
Sensory adaptation
sensitivity to an unchanging stimulus diminshes –> allows for detection of informative changes
how sensory data is translated into perception is :
inner psychophysics
Direct perception
A theory of inner psychophysics, that claims thta perception is directly defined by the stimulus –> representationalism
Problems in direct perception theory
Bistable illusions, perception can be ambiguous our measurements might not be sufficient to detect one correct perception.
Indirect perception
A theory of inner psychophysics, claims that our representation of the world can change even if the external world does not, supporetd by Gregory
Gestalt Laws; Emergence
Perceptions emrge from data, sometimes slow, sometimes fast, sometimes wrong; like seeing a figure in the clouds.
Gestalt Laws; Reification
Pereception can reach beyond what the data suggest, we generate it/ is generated.
