Zipf's Law : Balancing signal usage cost and communication efficiency

Salge, Christoph, Ay, Nihat, Polani, Daniel and Prokopenko, Mikhail (2015) Zipf's Law : Balancing signal usage cost and communication efficiency. PLoS ONE, 10 (10): e0139475.
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We propose a model that explains the reliable emergence of power laws (e.g., Zipf's law) during the development of different human languages. The model incorporates the principle of least effort in communications, minimizing a combination of the information-Theoretic communication inefficiency and direct signal cost. We prove a general relationship, for all optimal languages, between the signal cost distribution and the resulting distribution of signals. Zipf's law then emerges for logarithmic signal cost distributions, which is the cost distribution expected for words constructed from letters or phonemes. Copyright:


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