Universität zu Köln

Costs and advantages in bimodal bilingual language production: Language-switching and dual-task paradigms

Kaufmann, Emily (2014) Costs and advantages in bimodal bilingual language production: Language-switching and dual-task paradigms. PhD thesis, Universität zu Köln.

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    Previous studies of unimodal (spoken–spoken) language switching have often found longer reaction times and higher error rates in switch trials than in repeat trials, particularly for unbalanced bilinguals. Studies of hearing signers (bimodal bilinguals) have found that they often produce ‘code-blends’ rather than sequential code-switches; such simultaneous production is generally not possible in unimodal utterances. The present study explored sequential language switching and simultaneous language production (dual-task) in bimodal bilinguals. The Methodological Experiment adapted the language-switching paradigm, used previously to test unimodal language switching, to bimodal data and required significant methodological development. The Methodological Experiment and Experiment 1 examined modality effects in language switching with two Modalities: unimodal (German–English) and bimodal (German–DGS). Reaction times were shorter, error rates lower and switch costs smaller in bimodal switching blocks than in unimodal blocks, indicating a bimodal language switching advantage. Experiment 2 examined simultaneous bimodal language production, comparing dual-task and single-task trials in order to determine whether there are dual-task advantages. Previous studies found dual-task costs, or in some cases, no dual-task cost and no advantage, for responses across modalities in non-language tasks. However, our results show that in a bimodal bilingual switching condition, there can be a dual-task advantage, especially when switching into a dual-task trial (code-blend). We suggest that language is different from other task components in task-switching and dual-task studies and that a code-blend forms a unit which is greater than the sum of its parts.

    Item Type: Thesis (PhD thesis)
    Kaufmann, Emilyemily.kaufmann@uni-koeln.de
    URN: urn:nbn:de:hbz:38-56052
    Subjects: Psychology
    Language, Linguistics
    Other languages
    Uncontrolled Keywords:
    Bilingualism, Sign language, Language modality, Language switching, Dual-task paradigmEnglish
    Faculty: Humanwissenschaftliche Fakultät
    Divisions: Humanwissenschaftliche Fakultät > Department für Heilpädagogik und Rehabilitation
    Language: English
    Date: 2014
    Date Type: Publication
    Date of oral exam: 09 April 2014
    NameAcademic Title
    Kaul, ThomasProf. Dr.
    Rietz, ChristianProf. Dr.
    Full Text Status: Public
    Date Deposited: 30 Jun 2014 15:04:46
    NameAcademic Title
    Kaul, ThomasProf. Dr.
    Rietz, ChristianProf. Dr.
    URI: http://kups.ub.uni-koeln.de/id/eprint/5605

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