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Some personal computers have external tape units.
Difference Threshold
The smallest change in sensation that can be perceived half the time by an individual, also referred to as the just noticeable difference (JND).
Cataracts
A medical condition where the lens of the eye becomes progressively opaque, resulting in blurred vision.
Signal Detection Theory
An approach to evaluate the capability of identifying information-carrying patterns from random ones that interfere with the information.
Absolute Threshold
The minimum intensity of a stimulus required to be perceived by the senses.
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