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1
The mechanisms and the scope of bilingual language production
Branzi, Francesca Martina, 1984-. - : Universitat Pompeu Fabra, 2014
In: TDX (Tesis Doctorals en Xarxa) (2014)
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2
On the bilingualism effect in task switching
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3
A multiple-choice task with changes of mind
Abstract: The role of changes of mind and multiple choices has recently received increased attention in the study of perceptual/ndecision-making. Previously, these extensions to standard two-alternative tasks have been studied separately. Here we/nexplored how changes of mind depend on the number of choice-alternatives. To this end, we tested 14 human subjects on/na 2- and 4-alternative direction-discrimination task. Changes of mind in the participants’ movement trajectories could be/nobserved for two and for four choice alternatives. With fewer alternatives, participants responded faster and more/naccurately. The frequency of changes of mind, however, did not significantly differ for the different numbers of choice/nalternatives. Nevertheless, mind-changing improved the participants’ final performance, particularly for intermediate/ndifficulty levels, in both experimental conditions. Moreover, the mean reaction times of individual participants were/nnegatively correlated with their overall tendency to make changes of mind. We further reproduced these findings with a/nmulti-alternative attractor model for decision-making, while a simple race model could not account for the experimental/ndata. Our experiment, combined with the theoretical models allowed us to shed light on: (1) the differences in choice/nbehavior between two and four alternatives, (2) the differences between the data of our human subjects and previous/nmonkey data, (3) individual differences between participants, and (4) the inhibitory interaction between neural/nrepresentations of choice alternatives. ; This work was supported by the “CONSOLIDER-INGENIO 2010” Programme in the “Brainglot” project (Bilingualism and Cognitive Neuroscience) CSD2007-00012. FMB was supported by a predoctoral fellowship from the Spanish Government (FPU 2009-2013). GD was further supported by the Spanish Ministry of Science in the project “Communication and Information Processing Between Cortical Circuits: Oscillations and Plasticity” SAF2010-16085. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
URL: http://hdl.handle.net/10230/25862
https://doi.org/10.1371/journal.pone.0043131
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4
On the reliability of switching costs across time and domains
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5
On the overlap between bilingual language control and domain-general executive control
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6
On the overlap between bilingual language control and domain-general executive control
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7
Qualitative differences between bilingual language control and executive control: evidence from task-switching
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