Rules and analogy in Russian loanword adaptation and novel verb formation Russian stem extensions



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Rules and analogy in Russian loanword adaptation and novel verb formation


Russian stem extensions

  • -i- event  event+i+ ‘happen’

  • -a- eat  it+a+ ‘eat’

  • Source: The Big Dictionary of Youth Slang, 2003

    • Borrowed verbs
    • New verbs formed from nouns


Which stem extensions are more productive?



The questions

  • How can we predict the choice of the stem extension?

    • Is one extension applied by default?
      • Predicted by the Dual Mechanism Model (Pinker and Prince 1988, 1994)
    • Locality effects
      • Analogical vs. schema-based accounts?
        • Do parts of the root adjacent to the root-suffix boundary influence suffix choice more than more distant parts of the root?
        • Do parts of the root that are not adjacent to the root-suffix boundary influence the choice of the suffix?
          • Unexpected under the Rule-Based Learner (Albright and Hayes 2003)


Part I. Defaultness



Phonotactic influences: It’s not all phonotactic



Phonotactics do not explain all the variation

  • Can analogy to existing words predict the stem extension taken by a borrowed verb?

  • Analogy:

    • The borrowed verb will take the stem extension of the majority of its neighbors.
    • Verbs are neighbors if their roots share at least 2/3 of their phonemes


Analogical predictions



Similarity effect



Final consonant as a predictor



Analogy vs. Final consonant Breakdown by stem extension



When analogy makes no prediction

  • In 8.5% of verbs, analogy makes no prediction

    • Numbers of nieghbors taking each stem extension are equal
    • OR
    • No neighbors
    • What determines stem extension choice then?




Number of neighbors=0



Interim Summary

  • Analogy accounts for 87% of the data excluding velars

  • Analogy performs better than specifying the final consonant

  • Analogy predicts –i better than it predicts –a

    • (70% vs. 93%)
  • When there are no neighbors, coronals are always followed by -i



An issue for the Dual Mechanism Model

  • Pinker and Prince (1988, 1994):

    • One suffix should be more productive than the other suffix with novel lexical items that are not similar to existing ones
      • -i > –a after coronals
      •  -i is the default
    • This suffix is applied by default. Hence, analogy should be less able to predict when this suffix will occur.
  • Possible accounts:

    • Analogy
    • Associations between parts of the root and suffixes
      • Associations should be stronger when the distance between the suffix and the part of the root is small


Part II. Locality



Do neighbors that don’t share the final C matter?

  • Albright and Hayes (2003):

    • The only segment strings that can be associated with a suffix are uninterrupted segment strings that include the final segment
  • Weaker version:

    • Suffixes can be associated with adjacent phonological chunks more strongly than with non-adjacent ones


Testing the hypothesis of lack of non-local dependencies



Adjacent dependencies are stronger



Combining predictors

    • If we know
    • What do most neighbors sharing final C take?
    • What do most words with this final C take?
    • Do we need to know
    • What do most neighbors that do not share final C take?


Final consonant vs. final-sharing neighbors



Non-local dependencies still important

  • Logistic Regression:

    • Final C: χ2= 31.0
    • Neighbors sharing final C: χ2 = 329.8
    • Neighbors not sharing final C: χ2 = 181.7
    •  Local dependencies are stronger
    • All predictors are significant at p<.0005
    •  Non-local dependencies do exist


Conclusion

  • Huge similarity effects for both stem extensions

  • All productive suffixes sensitive to similarity

  • But, after coronals

    • -a is less predictable than –i based on analogy
    • -i is more productive than –a when there are no analogical models nearby
    • Defining attributes of a DMM default are dissociable (cf. Kapatsinski 2005)


Conclusion

    • -a is less predictable than –i based on analogy
  • Possible reason:

    • There are more –i verbs than –a verbs in the lexicon
  • Possible analogical solution:

    • Thus, a given neighbor is more likely to bear –i than it is to bear –a
    • Thus, occurrence of an –a neighbor is more salient than occurrence of an –i neighbor


Conclusion

  • After coronals

    • -i is more productive than –a when there are no analogical models nearby
    • -i and –a are equally productive when there are as many neighbors bearing –i as neighbors bearing -a
  • Interpretation:

      • Use analogy whenever possible;
      • if both alternatives have equal support, then they are equally acceptable;
      • if no analogical models, use phonotactics


Conclusion

  • Analogy or schemas?

    • Activate similar words?
    • Activate sublexical chunks associated with suffixes?
  • Locality effects support the schematic account (cf. Albright and Hayes 2003):

    • Dependencies between adjacent segments are easier to learn than dependencies between non-adjacent ones (e.g., Hudson Kam and Newport 2005)
  • While adjacent dependencies are stronger, non-adjacent dependencies seem to also play a role in suffix choice (contra Albright and Hayes 2003).



  • Thank you!



Acknowledgements

  • N.I.H. for financial support through a training grant to David Pisoni and the Speech Research Lab

  • Tessa Bent, Adam Buchwald, Joan Bybee, and Susannah Levi for helpful discussion



References

  • Albright, A., and B. Hayes. 2003. Rules vs. analogy in English past tenses: A computational/ experimental study. Cognition 90, 119-61.

  • Bybee, J. L. 1985. Morphology: A study of the relation between meaning and form. Benjamins.

  • Bybee, J. L. 1995. Regular morphology and the lexicon. Language and Cognitive Processes, 10. 425-455.

  • Kapatsinski, V. M. 2005. Characteristics of a rule-based default are dissociable: Evidence against the Dual Mechanism Model. In S. Franks, F. Y. Gladney, and M. Tasseva-Kurtchieva, eds. Formal Approaches to Slavic Linguistics 13: The South Carolina Meeting, 136-46. Michigan Slavic Publications.

  • Pinker, S., and A. Prince. 1988. On language and connectionism: Analysis of a parallel distributed processing model of language acquisition. Cognition, 28, 73-193.

  • Pinker, S., and A. Prince. 1994. Regular and irregular morphology and the psychological status of rules of grammar. In S. D. Lima, R. L. Corrigan, and G. K. Iverson, eds. The reality of linguistic rules, 321-51. Benjamins.



Breakdown by place of articulation of final C



Extracting the dependencies

  • For a dependency between a part of the root and a suffix to be formed, many roots must share the same sublexical chunk and the same stem extension

  • Is this the case?

  • What are the major schemas?

  • Are they all local?



Separate networks for –a and –i verbs



The most connected –a verbs min number of neighbors = 20



The most connected –i verbs min number of neighbors = 35



Adding some less connected –i verbs (min #of neighbors = 20)



Conclusion

  • There are large clusters of verbs in the lexicon in which all verbs are similar to each other in exactly the same way, which could give rise to schema formation.

  • Many of such schemas would not involve sharing segments that are adjacent to the suffix.




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