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The phonology-morphosyntax interface: affixed words in agrammatism.
1City University of New York Graduate School, New York 10036, USA. lkobler@bu.edu
Brain and Language
|August 6, 1999
Summary
Phonological complexity in word stems and affixes impacts language production in individuals with agrammatism. This complexity affects the ability to produce inflections and derived words, highlighting challenges in morphological processing.
Area of Science:
- Linguistics
- Neurolinguistics
- Psycholinguistics
Background:
- Agrammatism, a language disorder often associated with brain damage, affects grammatical structuring.
- The interplay between phonological characteristics and morphosyntactic processing in agrammatism remains an area for further investigation.
- Previous research has primarily focused on syntactic deficits, with less attention paid to phonological influences on morphology.
Purpose of the Study:
- To investigate the association between phonological factors and morphosyntactic production in individuals with agrammatism.
- To determine how phonological complexity of word stems and affixes influences the production of inflections and derived words.
- To explore cross-linguistic differences in these phonological effects on agrammatic language production.
Main Methods:
- Three experiments were conducted with participants diagnosed with nondysarthric agrammatism.
- Experiment 1 examined inflectional-affix production in English verbs, analyzing factors like stem-syllabic length and stem-final consonant clusters.
- Experiments 2 and 3 investigated verb inflections and derived word production in Spanish and English speakers, respectively, considering affix length, stress, frequency, and stem properties.
Main Results:
- Longer stem-syllabic length and stem-final consonant clusters negatively impacted inflectional-affix production in English.
- In Spanish, affix length, affix stress, and low affix frequency correlated with poorer verb inflection repetition.
- Syllable length and stem-stress reassignment independently contributed to word-production difficulty in English-speaking agrammatics.
Conclusions:
- Phonological complexity of both affixes and stems plays a significant role in reducing processing resources for morphological tasks in nondysarthric agrammatics.
- These findings suggest that phonological factors are critical determinants of morphosyntactic deficits in agrammatism.
- The study underscores the need to consider phonological influences when assessing and treating language production difficulties in agrammatic individuals.