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Why aren't irregular past tense verbs and irregular plurals counted as two morphemes?

Why aren't irregular past tense verbs (e.g. saw) and irregular plurals (e.g. geese) counted as two morphemes? Posted by SALT Support Staff Aug 17, 2014

One thought on “Why aren't irregular past tense verbs and irregular plurals counted as two morphemes?”

  • Salt Support

    There is a SALT blog titled “Why do we mark some bound morphemes and not others” which you should read. We do not count irregulars as two morphemes. These forms only affect MLU in a slight way and can be accounted for by other means if there is interest, e.g., count the number of irregulars, double it and add this to the morpheme count before calculating MLU. The correlations of MLU with age are not affected and remain the same for words as well as morphemes using SALT segmentation or C-Unit segmentation (53% of the variance for conversation and 72% for narrative sample data in children 3 - 13 years, N=252).
    Posted by SALT Support Staff August 17, 2014 and edited on Jan 10, 2019

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