The perception of forms can be considered from two fundamental perspectives:
viewer-centered representation considers the appearance of an object relative to the viewer
, and object-centered representation considers the appearance of the object itself, regardless of the distance and angle from which it is viewed.
What is object-centered?
In an object-centered representation,
the position of the subparts of an object are encoded with respect to a set of axes and an origin centered on the object
. Several physiological and neuropsychological results support the existence of such representations in humans and monkeys.
What is viewer-centered representation in cognitive psychology?
Viewer-Centered Representation
The shape of the object fluctuations
, depending on the angle from which we look at it. A number of views of the object are stored, and when we try to recognize an object, we have to rotate that object in our mind until it fits one of the stored images.
What is the difference between distal and perceptual object?
This may allow the user to infer that a distal object is present, without experiencing it as such. In a perceptual strategy, on the other hand, one is
aware
of the distal object itself, without explicitly attending to the proximal stimulation.
What is landmark centered representation?
Landmark-centered representation– information is characterized by its relation to a well-known item.
Visiting a new city
.
What is object-centered perception?
The so-called object-centered theory suggests that
recognizing objects is based on constructing a structural description of simple parts
(e.g., geons), which does not require explicit representations of objects from specific views ( Biederman, 1987.
What does an object Centred approach focus on?
An object-centered approach, following art historian Bernard Herman is one in which the focus of study is
on the object itself, specifically its physical attributes and its provenance
; this is the kind of descriptive, check-list approach that forms most museums catalogues of their collections.
What is one problem with the viewer centered approach?
it
cannot explain how we perceive an object from different viewpoints
. You have no difficulty distinguishing between the letters O and W, but it takes longer to distinguish between the letters O and Q. Which theory of object recognition does this support? Feature-analysis theory.
What is distal and proximal stimulus in psychology?
distal stimuli are
objects and events out in the world about you
. proximal stimuli are the patterns of stimuli from these objects and events that actually reach your senses (eyes, ears, etc.)
How many Geons are there?
Geons. The recognition-by-components theory suggests that there are
fewer than 36 geons
which are combined to create the objects we see in day-to-day life. For example, when looking at a mug we break it down into two components – “cylinder” and “handle”.
What are the three psychophysical methods?
Classical psychophysical methods. Psychophysical experiments have traditionally used three methods for testing subjects’ perception in stimulus detection and difference detection experiments:
the method of limits, the method of constant stimuli and the method of adjustment.
What is a psychophysical test?
Psychophysical testing is
performed prior to and during electric stimulation mapping to identify possible deficits in auditory cortical function associated with stimulation of specific sites
.
What is sensory stimulus MCAT?
Sensory stimulus is more referring to the
type of information being received by your receptors which elicits a response
… ie: light, heat, touch, sound, etc.
What is the principle of perception?
Our perceptions are based on
perceptual hypotheses
: educated guesses that we make while interpreting sensory information. These hypotheses are informed by a number of factors, including our personalities, experiences, and expectations. We use these hypotheses to generate our perceptual set.
What is an example of a proximal stimulus for sound?
The image recorded onto the person’s retina (sensory receptor) is proximal stimulus. Another example would be a
telephone ringing
. The ringing of the telephone is the distal stimulus. The sound being recognized and understood as the ringing of a telephone, by our sensory receptors, is the proximal stimulus.
What is perceptual object?
The objects of perception are
what we are directly aware of when perceiving
. … Sense data are mind-dependent objects that actually have the properties (e.g., color and shape) that we may take external objects to possess in perception. There are two varieties of sense datum theory.
