Re: [Corpora-List] question as to MI and t score

From: Ramesh Krishnamurthy (r.krishnamurthy@aston.ac.uk)
Date: Thu Dec 15 2005 - 12:57:53 MET

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    Please see http://torvald.aksis.uib.no/corpora/1999-4/0146.html

    If I have understood correctly, the MI score tells you about the
    'strength of association'
    (but if the corpus frequency figures for either item are very low,
    then you may not have much
    confidence in the association; eg extreme case: X and Y occur only
    once each in the corpus,
    but in that one occurrence, they are adjacent to each other); t-score
    takes into account the
    corpus frequency of the items, so gives you a'confidence rating' in
    the association...

    I suspect that the corpus frequencies for ['play' and 'role] and
    ['fight' and 'battle'] would also have to be
    similar for you to make the claim that they have a similar overall
    collocational relationship...

    Hope this helps
    Ramesh

    At 16:14 14/12/2005, Helene Stengers wrote:
    >Dear list,
    >
    >Imagine you have called up collocation listings for the node word
    >lemmas "play" and "fight". In both lists, the association with for
    >example the collocates "role" and "battle" has the exactly the
    >same MI / t score. Can I assume that both collocations, i.e. "play a
    >role" and "fight a battle" have the same "collocational strength",
    >or is that a wrong assumption?
    >
    >Thanks,
    >Helene

    Ramesh Krishnamurthy
    Lecturer in English Studies
    School of Languages and Social Sciences
    Aston University, Birmingham B4 7ET, UK
    Tel: +44 (0)121-204-3812
    Fax: +44 (0)121-204-3766
    http://www.aston.ac.uk/lss/english/

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