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- Genre: Academic theses
- Creators: Berisha, Visar
Description
The activation of the primary motor cortex (M1) is common in speech perception tasks that involve difficult listening conditions. Although the challenge of recognizing and discriminating non-native speech sounds appears to be an instantiation of listening under difficult circumstances, it is still unknown if M1 recruitment is facilitatory of second language speech perception. The purpose of this study was to investigate the role of M1 associated with speech motor centers in processing acoustic inputs in the native (L1) and second language (L2), using repetitive Transcranial Magnetic Stimulation (rTMS) to selectively alter neural activity in M1. Thirty-six healthy English/Spanish bilingual subjects participated in the experiment. The performance on a listening word-to-picture matching task was measured before and after real- and sham-rTMS to the orbicularis oris (lip muscle) associated M1. Vowel Space Area (VSA) obtained from recordings of participants reading a passage in L2 before and after real-rTMS, was calculated to determine its utility as an rTMS aftereffect measure. There was high variability in the aftereffect of the rTMS protocol to the lip muscle among the participants. Approximately 50% of participants showed an inhibitory effect of rTMS, evidenced by smaller motor evoked potentials (MEPs) area, whereas the other 50% had a facilitatory effect, with larger MEPs. This suggests that rTMS has a complex influence on M1 excitability, and relying on grand-average results can obscure important individual differences in rTMS physiological and functional outcomes. Evidence of motor support to word recognition in the L2 was found. Participants showing an inhibitory aftereffect of rTMS on M1 produced slower and less accurate responses in the L2 task, whereas those showing a facilitatory aftereffect of rTMS on M1 produced more accurate responses in L2. In contrast, no effect of rTMS was found on the L1, where accuracy and speed were very similar after sham- and real-rTMS. The L2 VSA measure was indicative of the aftereffect of rTMS to M1 associated with speech production, supporting its utility as an rTMS aftereffect measure. This result revealed an interesting and novel relation between cerebral motor cortex activation and speech measures.
ContributorsBarragan, Beatriz (Author) / Liss, Julie (Thesis advisor) / Berisha, Visar (Committee member) / Rogalsky, Corianne (Committee member) / Restrepo, Adelaida (Committee member) / Arizona State University (Publisher)
Created2018
Description
Learning a second language has been shown to have many benefits, but in the
state of Arizona the teaching and learning of second languages has been restricted since the passing of Proposition 203. In the past few years, schools offering Dual Language Immersion programs have emerged, but their teachers do not have much experience, training or resources to teach language through content. Language immersion self- efficacy has been shown to be crucial for the teachers to be more effective in their instruction and for them to embrace the challenges they face.
The purpose of this action research study was to increase Spanish immersion teachers' self-efficacy through a community of practice, in which teachers performed peer observations and offered feedback, collaboratively drew from a pool of resources that were available online for all to use, and supported each other in the areas they felt could be improved.
Quantitative data included pre- and post- intervention self-efficacy surveys, as well as a retrospective survey. Qualitative data included audio recordings and field notes from the community of practice sessions, teacher observations, peer observations, and feedback meetings, as well as interviews.
Results from the analysis of data showed an increase of teachers’ self-efficacy because of the close collaboration and resource sharing that took place during the implementation of the community of practice. Teachers also reported positive changes in practice due to peer observations and collegial conversations during meetings, where teachers could acknowledge their own successes and use ideas from others to improve their practice. Finally, despite all the positive outcomes from this action research study, it was evident there were some systemic issues the community of practice could not change, such as the lack of resources and appropriate curriculum for Spanish immersion teachers.
Many parents and educators have agreed our students should have the opportunity of becoming bilingual to face global competition more effectively. Because of that, Spanish immersion schools have been growing in popularity in Arizona. Moreover, it has become clear that as we have more schools and teachers willing to adopt these programs, more resources must be made available to support immersion teachers and their instruction.
state of Arizona the teaching and learning of second languages has been restricted since the passing of Proposition 203. In the past few years, schools offering Dual Language Immersion programs have emerged, but their teachers do not have much experience, training or resources to teach language through content. Language immersion self- efficacy has been shown to be crucial for the teachers to be more effective in their instruction and for them to embrace the challenges they face.
The purpose of this action research study was to increase Spanish immersion teachers' self-efficacy through a community of practice, in which teachers performed peer observations and offered feedback, collaboratively drew from a pool of resources that were available online for all to use, and supported each other in the areas they felt could be improved.
Quantitative data included pre- and post- intervention self-efficacy surveys, as well as a retrospective survey. Qualitative data included audio recordings and field notes from the community of practice sessions, teacher observations, peer observations, and feedback meetings, as well as interviews.
Results from the analysis of data showed an increase of teachers’ self-efficacy because of the close collaboration and resource sharing that took place during the implementation of the community of practice. Teachers also reported positive changes in practice due to peer observations and collegial conversations during meetings, where teachers could acknowledge their own successes and use ideas from others to improve their practice. Finally, despite all the positive outcomes from this action research study, it was evident there were some systemic issues the community of practice could not change, such as the lack of resources and appropriate curriculum for Spanish immersion teachers.
Many parents and educators have agreed our students should have the opportunity of becoming bilingual to face global competition more effectively. Because of that, Spanish immersion schools have been growing in popularity in Arizona. Moreover, it has become clear that as we have more schools and teachers willing to adopt these programs, more resources must be made available to support immersion teachers and their instruction.
ContributorsSalas, Raquel (Author) / Bertrand, Melanie (Thesis advisor) / Buss, Ray R. (Committee member) / Hightower, Guadalupe (Committee member) / Arizona State University (Publisher)
Created2016