Ch 2 Vision Flashcards
Perception
The psychological process through which we interpret sensory stimulation
Sensation
The stimulation of sensory receptors and the transmission of sensory information to the central nervous system
Absolute threshold
The weakest amount of a stimulus that can be sensed
Difference threshold
The minimum amount of difference that can be detected between two stimuli
What is the stimulus for vision
Electromagnetic energy
What are the receptors for hearing
Hair cells of the inner ear
What is the threshold for smell
One drop of perfume diffused throughout a small house
What is the stimulus for taste
Chemical substances in saliva
What are the receptors for touch
Nerve endings in the skin
What are the receptors for vision
Rods and cones in the retina
What is the threshold for hearing
The ticking of a watch from about 20 feet away in a quiet room
What is the stimulus for smell
Chemical substances in the air
What are the receptors for taste
Taste buds on the tongue
What is the threshold for touch
The wing of a fly falling on a cheek from a distance of about .4 inches
What is the threshold for vision
A candle flame view it from a distance of about 30 miles on a dark night
What is the stimulus for hearing
Soundwaves
What are the receptors for smell
Receptor cells in the nose
What is the threshold for taste
About 1 teaspoon of sugar dissolved into 2 gallons of water
What is the stimulus for touch
Pressure on the skin
Signal detection theory
Method of distinguishing sensory stimuli that takes into account not only their strengths but also such elements of the setting your physical state your mood in your attitudes
Sensory adaptation
The process by which we become more sensitive to wake stimuli and less sensitive to unchanging stimuli
The pupil
The opening in the colored part of the eye that determines the amount of light that can enter
The lens
Adjusts to the distance of objects by changing its thickness
Retina
The sensitive surface in the eye that consists of neurons
