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1. a thermodynamic quantity providing a measure of the unavailability of the energy of a closed system to do work.

2. in statistics, an indication of the degree of disorder, disequilibrium, or change of a closed system. For example, an entropy measure may be used to indicate the quality of classification in a cluster analysis. Clusters with high similarity would have low entropy, whereas clusters with more dispersion would have higher entropy.

3. in information theory, a measure of the efficiency with which a system transmits information.

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Psychology term of the day

February 26th 2024

spasmodic dysphonia

spasmodic dysphonia

a rare voice disorder with symptoms including momentary periods of uncontrolled vocal spasms, stuttering, tightness in the throat, and recurrent hoarseness. The cause is unknown, but the condition may be attributed to a neurological or physiological disturbance or to psychological factors. Spasmodic dysphonia (formerly known as spastic dysphonia) particularly affects public speakers.