Collocation extraction is the task of using a computer to extractcollocations automatically from acorpus.
The traditional method of performing collocation extraction is to find a formula based on the statistical quantities of those words to calculate a score associated to every word pairs. Proposed formulas aremutual information,t-test,z test,chi-squared test andlikelihood ratio.[1]
Within the area ofcorpus linguistics,collocation is defined as a sequence of words orterms whichco-occur more often than would be expected by chance. 'Crystal clear', 'middle management', 'nuclear family', and 'cosmetic surgery' are examples of collocated pairs of words. Some words are often found together because they make up acompound noun, for example 'riding boots' or 'motor cyclist' or ‘collocation extraction’ its very self.
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