Please enable JavaScript.
Coggle requires JavaScript to display documents.
sensation( it is a process which our brain takes information from outside…
sensation( it is a process which our brain takes information from outside world by sensation or through our sensory process)
-
-
-
synesthesia
it is a disorder in which the signals rom various sensory organs are processed in a wrong cortical area, which results in the sense information being interpreted as more than one sensation.
-
sensory thresholds
-
stimuli that are below the level of conscious awareness are called subliminal stimuli, they are not strong enough for people to be consciously aware of them, so they are going through unconscious mind, influencing behavior in a process called subliminal perception
absolute threshold
the lowest level of stimulation a person can consciously detect 50 percent of the time the stimulation is present
-
sensory adaptation
-
this is different than habitation, in habitation the sensory receptors still take the signal and send it to the brain but brain doesn't send it to cortex for perception.
this would be a little different in eyes because there is a constant movement in the eyes that never let them to be entirely still. These tiny little vibration called microsaccades or saccadic movement
-
vision
structure of the eye
cornea
curved, transparent dome that bends incoming light waves so the image can be focused on retina.
pupil
opening in the center of the iris that changes the size depending on the amount of light in the environment.
-
-
retina
inner most layer of the eye, where incoming light is converted into nerve impulses ; contain photoreceptor cells
-
-
-
-
how we will see
physical stimulus: light waves reflected from the image pass through the cornea and enter the eye through pupil. the lens focuses the light on the retina.
sensation: sensory receptors in retina which are called rods and cones, detect the light wave.
Transduction: rods and cones convert light waves into signals. those signals are processed by ganglion cells, which generate action potentials that are sent to the brain by the optic nerve.
-
-
-
visual pathway
retina-> optic nerve-> optic chiasm -> optic tract-> LGN of Thalamus-> optic radiations-> primary visual cortex
-
-
-
-
-
phantom limbs (a sensation experienced by someone who has had a limb amputated that the limb is still there.)
-
-
-
-
-
-
Perceiving Pitch
-
Frequency theory
-
Explains perception of lower pitches (< 1,000 Hz)
-
Perceptual Illusions
examples
Hermann Grid
when you are looking at the matrix of squares gray blobs that fade away or disappear completely when you try to look directly at them.
Müller-Lyer Illusion
illusion o line length that is distorted by inward-turning or outward- turning corners on the ends o lines, causing lines of equal length to appear to be different.
-
Motion Illusions
Autokinetic effect
a small, stationary light in a darkened room will appear to move or drift
-
-
-
-
-
-
-
Types of Processing
Top-down processing
the use of preexisting knowledge ( perceptual set) to organize individual features into a unified whole
-