Examlex
Construct validity is the simplest and easiest type of validity to establish.
Human Eye
A complex organ capable of receiving visual images, which are then processed by the brain, it comprises structures such as the cornea, iris, lens, and retina.
Camera
A device for capturing visual images in the form of photographs, video recordings, or digitally.
Retina
The retina is the light-sensitive layer of tissue at the back of the eye, which detects light and converts it into neural signals for processing by the brain.
Absolute Threshold
The minimum level of stimulus intensity needed for a person to detect its presence at least half the time.
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