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Cogan Lab

@coganlab.bsky.social
285 followers 25 following 479 posts

The Cogan Lab at Duke University: Investigating speech, language, and cognition using invasive neural human electrophysiology coganlab.org

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Cogan Lab @coganlab.bsky.social · 19/08/2026
Can a speech BCI learn across people? In Nature Communications, led by @zspald.bsky.social: High-density µECoG reveals shared neural dynamics that can be aligned to improve cross-patient speech decoding, even with little data from a new participant. doi.org/10.1038/s414... 1/5
doi.org
Shared latent representations of speech production for cross-patient speech decoding - Nature Communications
Current speech brain-computer interfaces (BCIs) rely on patient-specific decoding approaches. Here, the authors show that patient-specific data can be aligned to a shared space that preserves speech i...
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Cogan Lab @coganlab.bsky.social · 18/08/2026
How does a speech plan become fluent movement? In Nature Human Behaviour, led by Kumar Duraivel: Intracranial recordings reveal how hierarchical speech plans become continuous motor sequences across planning, articulation, and monitoring networks. doi.org/10.1038/s415... 1/5
doi.org
Distinct neural processes link speech planning and execution - Nature Human Behaviour
Direct recordings from the human brain reveal a hierarchy in planning to speak, with neural activity organizing whole syllables before the individual sounds that compose them are sequenced.
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Cogan Lab @coganlab.bsky.social · 17/08/2026
Two new papers from the lab in Nature Human Behaviour and Nature Communications, spanning the neural mechanisms of speech production and new approaches to speech neurotechnology! 🧠 Speech plans → fluent motor sequences 🗣️ Speech BCIs across people Links below 👇 @dukebrain.bsky.social 1/3
Graphic announcing two new Cogan Lab papers. The Nature Human Behaviour paper asks how the brain turns a speech plan into fluent movement, illustrated as planning → articulation → monitoring. The Nature Communications paper asks whether a speech BCI can learn from other people, illustrated by neural activity from two individuals converging on a shared latent representation.
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Cogan Lab @coganlab.bsky.social · 21/07/2026
Last week, Areti Majumdar (2nd year PhD student) presented @jerrytang.bsky.social and colleague’s seminal paper on reconstructing continuous language from non-invasive brain recordings. This 🧵 explores our thoughts and questions.
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Tobias Egner @tobiasegner.bsky.social · 15/07/2026
New paper out: Led by super grad student Jim Zhang and in collaboration with Greg Cogan, we review and synthesize Insights into the neural mechanisms supporting cognitive stability and flexibility from human intracranial electroencephalography. For free access: authors.elsevier.com/a/1nRYWY3M3p...
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Cogan Lab @coganlab.bsky.social · 15/07/2026
Our new review paper lead by CNAP PhD Student Jim Zhang and @tobiasegner.bsky.social is now published in Neuroscience & Biobehavioral Reviews: “Insights into the neural mechanisms supporting cognitive stability and flexibility from human intracranial EEG.” doi.org/10.1016/j.ne... 1/5
doi.org
Redirecting
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Cogan Lab @coganlab.bsky.social · 30/06/2026
Last week, Nanlin Shi (postdoctoral associate) presented T. Lei et al.’s new Nature paper, “Active dissociation of intracortical spiking and high gamma activity,” on whether intracortical HGA reflects local spiking or broader population activity.
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Cogan Lab @coganlab.bsky.social · 07/04/2026
Last week, Zac Spalding (@zspald.bsky.social‬, 4th year PhD student, @dukeubme.bsky.social‬) presented Aditya Singh and colleagues’ 2025 paper on multi-regional, multi-subject neural speech decoding using from SEEG electrodes.
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Cogan Lab @coganlab.bsky.social · 25/03/2026
Last week, Baishen Liang (postdoctoral associate) led a discussion on a recent ieeg speech paper from the Chang Lab by Patrick W. Hullett and colleagues on the frontal and temporal parallel cortical speech processing pathways.
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Cogan Lab @coganlab.bsky.social · 11/02/2026
Very excited to have you here and looking forward to working with you :)
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Cogan Lab @coganlab.bsky.social · 11/02/2026
Last week, Jim Zhang (4th year PhD student, @DukeBrain ) presented Sina Tafazoli’s paper on building compositional tasks with shared neural subspaces. This 🧵 explores our thoughts (🤍 & ❔)
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Cogan Lab @coganlab.bsky.social · 19/11/2025
Come by tomorrow morning to see Baishen's work on verbal working memory!
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Cogan Lab @coganlab.bsky.social · 17/11/2025
Come by this morning to see Areti's poster!
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Cogan Lab @coganlab.bsky.social · 16/11/2025
At #Sfn2025 ? Come see some of the lab's posters this afternoon!
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Cogan Lab @coganlab.bsky.social · 10/11/2025
Coming to San Diego for SfN and/or APAN? Come check out the intracranial work from the lab (7 posters)! There's a bit of everything this year, so come say hello! #Sfn2025 #Neuroscience #neuroskyence @dukebrain.bsky.social @dukeneurosurgery.bsky.social @dukeengineering.bsky.social
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Cogan Lab @coganlab.bsky.social · 13/09/2025
Come by tomorrow morning to hear about verbal working memory!
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Cogan Lab @coganlab.bsky.social · 12/09/2025
Stop by this afternoon to see some intracranial speech decoding in the hippocampus and to say hello!
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Cogan Lab @coganlab.bsky.social · 10/09/2025
Coming to DC for SNL later this week? Come check out our posters on speech decoding and verbal working memory using intracranial recordings! @snlmtg.bsky.social #SNL2025
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Cogan Lab @coganlab.bsky.social · 09/09/2025
Last week, Zac Spalding (@zspald.bsky.social‬, 4th year PhD student, @dukeubme.bsky.social‬) presented Adam Gosztolai, Robert Peach, and colleagues’ 2025 paper on MARBLE, a method for finding interpretable latent representations of neural dynamics.
nature.com
MARBLE: interpretable representations of neural population dynamics using geometric deep learning - Nature Methods
MARBLE uses geometric deep learning to map dynamics such as neural activity into a latent representation, which can then be used to decode the neural activity or compare it across systems.
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Duke Institute for Brain Sciences @dukebrain.bsky.social · 27/08/2025
Exciting work by PhD student Zac Spalding @zspald.bsky.social and multiple labs across departments at Duke! A combination of human electrophysiology, modeling/decoding, and cognitive concepts to improve BCI for speech in patients. 👏 🧠📈
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Cogan Lab @coganlab.bsky.social · 26/08/2025
From Cogan Lab Journal Club with @zspald.bsky.social these decomposition acronyms are getting out of hand!
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Cogan Lab @coganlab.bsky.social · 25/08/2025
We’re happy to present @zspald.bsky.social 's work on shared neural representations of speech production across individuals! We find that patient-specific data can be aligned to a shared space that preserves speech information, enabling cross-patient speech BCIs. www.biorxiv.org/content/10.1...
Aligned neural space for speech production allows for improved decoding in micro-ECOG patients for BCI
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Cogan Lab @coganlab.bsky.social · 19/08/2025
Last week, Nanlin Shi (Postdoctoral Associate) presented Jessie Liu and colleague’s latest work on speech encoding in the middle Precentral Gyrus (mPrCG). This 🧵 explores our thoughts (🤍 & ❔) www.nature.com/articles/s41...
nature.com
Speech sequencing in the human precentral gyrus - Nature Human Behaviour
Liu et al. examine the role of sustained neural activity in the planning and production of speech sequences, revealing a key role for the middle precentral gyrus.
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Cogan Lab @coganlab.bsky.social · 22/07/2025
This week, Jim Zhang (3rd year PhD student, @dukebrain.bsky.social) presented Brooke Staveland’s paper on circuit dynamics of approach-avoidance conflict in humans. This 🧵 explores our thoughts (🤍 & ❔) www.biorxiv.org/content/10.1...
biorxiv.org
Circuit dynamics of approach-avoidance conflict in humans
Debilitating anxiety is pervasive in the modern world. Choices to approach or avoid are common in everyday life and excessive avoidance is a cardinal feature of all anxiety disorders. Here, we used in...
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Cogan Lab @coganlab.bsky.social · 16/07/2025
Last week, Areti Majumdar (1st year PhD student) presented Leyao Yu and colleagues’ new paper on two overlapping but distinct frontal networks for word retrieval. This 🧵 explores our thoughts (🤍 & ❔) doi.org/10.1016/j.ce...
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Cogan Lab @coganlab.bsky.social · 13/06/2025
Last week, @danielsexton16.bsky.social (7th year Neurosurgery Resident at Duke University) presented Linnea Evanson and colleagues' new paper on comparing the development of language from childhood to adulthood and how it relates to LLMs. This 🧵 explores our thoughts (🤍 & ❔)
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Cogan Lab @coganlab.bsky.social · 22/05/2025
Last week, Nicole Liddle (CRS, Sr. @nicoleliddle.bsky.social) presented Çatal and colleagues’ 2024 paper on the flexibility of intrinsic neural timescales during distinct behavioral states. This 🧵 explores our thoughts (🤍 & ❔): www.nature.com/articles/s42...
nature.com
Flexibility of intrinsic neural timescales during distinct behavioral states - Communications Biology
Calcium imaging of spontaneously behaving mice show increased intrinsic neural timescales during behavior. The behavioral state of mice can be predicted from the topography of timescales of the cortex...
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Cogan Lab @coganlab.bsky.social · 28/04/2025
The Cogan Lab is looking for a new clinical research specialist/research assistant! If you are interested in speech, language, and BCI and want to work with patients implanted with intracranial electrodes, reach out! www.coganlab.org/news
coganlab.org
NEWS | Cogan Lab
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Cogan Lab @coganlab.bsky.social · 28/04/2025
The Cogan Lab is looking for a new clinical research specialist/research assistant! If you are interested in speech, language, and BCI and want to work with patients implanted with intracranial electrodes, reach out! www.coganlab.org/news
coganlab.org
NEWS | Cogan Lab
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Cogan Lab @coganlab.bsky.social · 15/04/2025
Last week, Baishen Liang (postdoctoral associate) presented recent verbal working work using two-dimensional neural geometry by Fan and colleagues: www.nature.com/articles/s41... This 🧵 explores our thoughts (🤍 & ❔) :
nature.com
Two-dimensional neural geometry underpins hierarchical organization of sequence in human working memory - Nature Human Behaviour
Working memory is constructive in nature. In three electroencephalography/magnetoencephalography studies, Fan et al. provide converging behavioural and neural evidence that a one-dimensional syllable ...
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Cogan Lab @coganlab.bsky.social · 15/01/2025
Last week, @danielsexton16.bsky.social (7th year Neurosurgery Resident at Duke University) presented Jonathan Daume and colleagues' new paper on single cell phase-amplitude coupling in a working memory task. This 🧵 explores our thoughts (🤍 & ❔) www.nature.com/articles/s41...
nature.com
Control of working memory by phase–amplitude coupling of human hippocampal neurons - Nature
Hippocampal theta–gamma phase–amplitude coupling integrates cognitive control and working memory storage across brain areas in humans.
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Cogan Lab @coganlab.bsky.social · 17/12/2024
This week, Areti Majumdar (1st year PhD student) presented @vibhaviswanathan.bsky.social and colleagues’ new paper on auditory response latencies and task-related effects in diverse cortical and subcortical regions. This 🧵 explores our thoughts (🤍 & ❔) www.biorxiv.org/content/10.1...
biorxiv.org
Intracranial Mapping of Response Latencies and Task Effects for Spoken Syllable Processing in the Human Brain
Prior lesion, noninvasive-imaging, and intracranial-electroencephalography (iEEG) studies have documented hierarchical, parallel, and distributed characteristics of human speech processing. Yet, there...
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Cogan Lab @coganlab.bsky.social · 18/11/2024
Last week, Zac Spalding (3rd year PhD student, Duke BME) presented Erin Kunz, Benyamin Meschede-Krasa, and colleagues' 2024 preprint on how covert speech is represented in the motor cortex. [cont.] www.biorxiv.org/content/10.1...
biorxiv.org
Representation of verbal thought in motor cortex and implications for speech neuroprostheses
Speech brain-computer interfaces show great promise in restoring communication for people who can no longer speak[1][1]–[3][2], but have also raised privacy concerns regarding their potential to decod...
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Cogan Lab @coganlab.bsky.social · 04/11/2024
Last week, undergraduate Raymond Xiong presented Jason Hsieh and colleagues’ new paper on network analysis & machine learning techniques to explore how focal cortical stimulation interacts with complex brain networks for language function. This 🧵 explores our thoughts (🤍& ❔)
nature.com
Cortical sites critical to language function act as connectors between language subnetworks - Nature Communications
It is unknown how cortical stimulation identifies brain regions critical to speech and language when they depend upon broader brain networks. Here the authors show that these critical areas function a...
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Gregory B. Cogan @gcogan.bsky.social · 25/10/2024
Had a great time presenting in the intracranial language symposium at #SNL2024!! Thanks to all the amazing speakers: Matt Leonard, Stéphanie Riès, Anna Mai,and especially to Jill Kries for organizing!!
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Cogan Lab @coganlab.bsky.social · 08/10/2024
Our preprint on the transition from planning to execution for speech production using intracranial recordings is online at biorxiv_neurosci! www.biorxiv.org/content/10.1... 1/10
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Cogan Lab @coganlab.bsky.social · 04/10/2024
Coming to Chicago for SfN? Interested in intracranial EEG and speech and cognition? Come see the lab’s posters!
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Cogan Lab @coganlab.bsky.social · 23/09/2024
Last week, Jim Zhang (3rd year PhD student, @dukebrain.bsky.social) presented Marije ter Wal and colleague’s paper on how human stereoEEG recordings reveal network dynamics of decision-making in a rule-switching task. This 🧵 explores our thoughts (🤍 & ❔) doi.org/10.1038/s414...
doi.org
Human stereoEEG recordings reveal network dynamics of decision-making in a rule-switching task - Nature Communications
How sensory evidence is transformed into motor output is not fully understood. Here, the authors use stereoEEG recordings during a rule-switching task to reveal network dynamics of decision-making.
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Cogan Lab @coganlab.bsky.social · 21/08/2024
Last week, Nicole Liddle (Sr. Clinical Research Specialist) presented Zilio, Gomez-Pilar and colleagues’ 2021 paper on how intrinsic neural timescales (INTs) relate to sensory vs. motor processing in abnormal states. This 🧵 explores her thoughts (🤍 & ❔) www.sciencedirect.com/science/arti...
sciencedirect.com
Are intrinsic neural timescales related to sensory processing? Evidence from abnormal behavioral states
The brain exhibits a complex temporal structure which translates into a hierarchy of distinct neural timescales. An open question is how these intrins…
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Cogan Lab @coganlab.bsky.social · 01/08/2024
This week, Jim Zhang (3rd year PhD student, @dukebrain.bsky.social) presented Juri Minxha and colleague’s paper on the flexible recruitment of memory-based choice representations by the human medial frontal cortex. This 🧵 explores his thoughts (🤍 & ❔) www.science.org/doi/10.1126/...
science.org
Flexible recruitment of memory-based choice representations by the human medial frontal cortex
Information stored in memory is selectively routed to the human frontal cortex only when a decision requires access to memory.
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Cogan Lab @coganlab.bsky.social · 16/07/2024
Last week, Ahmed Hadwan (3rd Year Undergraduate student, Duke Kunshan University) presented Alex Silva and colleagues’ new paper on shared cortical articulatory representations between languages for BCI. This 🧵 explores his thoughts (🤍 & ❔) www.nature.com/articles/s41...
nature.com
A bilingual speech neuroprosthesis driven by cortical articulatory representations shared between languages - Nature Biomedical Engineering
Multilingual articulatory representations in the speech-motor cortex of a participant with vocal-tract and limb paralysis enabled the development of a bilingual speech neuroprosthesis.
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Cogan Lab @coganlab.bsky.social · 20/06/2024
Last week, Aaron Earle-Richardson (Research Tech) presented Arthur Pellegrino and colleague’s new paper on Dimensionality reduction beyond neural subspaces with slice tensor component analysis. This 🧵 explores his thoughts (🤍 & ❔) www.nature.com/articles/s41...
nature.com
Dimensionality reduction beyond neural subspaces with slice tensor component analysis - Nature Neuroscience
Neural activity does not always lie in a low-dimensional subspace. The authors extend this classic view to show that task-relevant information is distributed across multiple covariability classes and ...
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Cogan Lab @coganlab.bsky.social · 29/05/2024
This week, Nicole Liddle (Sr. Clinical Research Specialist) presented @lauragwilliams.bsky.social and colleagues’ recent preprint on hierarchical dynamic coding of linguistic features during speech comprehension. This 🧵 explores her thoughts (🤍 & ❔) www.biorxiv.org/content/10.1...
biorxiv.org
Hierarchical dynamic coding coordinates speech comprehension in the brain
bioRxiv - the preprint server for biology, operated by Cold Spring Harbor Laboratory, a research and educational institution
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Cogan Lab @coganlab.bsky.social · 22/05/2024
This week, Jim Zhang (2nd year PhD student, @dukebrain.bsky.social) presented Weber and colleague’s paper on how ramping dynamics and theta oscillations reflect dissociable signatures during rule-guided human behavior. This 🧵 explores our thoughts (🤍 & ❔) www.nature.com/articles/s41...
nature.com
Ramping dynamics and theta oscillations reflect dissociable signatures during rule-guided human behavior - Nature Communications
The authors show that neuronal populations in the human prefrontal-motor network interact via two discernible communication modes – ramping dynamics and neural oscillations. These modes operate in con...
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Cogan Lab @coganlab.bsky.social · 14/05/2024
Last week, Ahmed Hadwan (3rd Year Undergraduate student at Duke Kunshan University) presented Ariel Goldstein and colleagues’ new paper on shared geometrical patterns between contextual linguistic embeddings and brain embeddings. This 🧵 explores our thoughts (🤍 & ❔) www.nature.com/articles/s41...
nature.com
Alignment of brain embeddings and artificial contextual embeddings in natural language points to common geometric patterns - Nature Communications
Here, using neural activity patterns in the inferior frontal gyrus and large language modeling embeddings, the authors provide evidence for a common neural code for language processing.
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Cogan Lab @coganlab.bsky.social · 29/04/2024
The CoganLab is looking for a postdoc to work on intracranial recordings of speech. Projects include speech production, verbal WM, and decoding for neural speech prostheses with micro-ECoG. Come join us at Duke! coganlab.org/postdoc24 @dukebrain.bsky.social
coganlab.org
Postdoc24 | Cogan Lab
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Cogan Lab @coganlab.bsky.social · 19/04/2024
Last week, Zac Spalding (2nd year BME PhD student) presented Gallego-Carracedo et al.’s 2022 paper investigating the relationship between latent dynamics of neural populations and local field potentials (LFPs) during movement. [cont.]
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Cogan Lab @coganlab.bsky.social · 04/04/2024
Last week, undergraduate sophomore Raymond Xiong presented YuanningLi and colleagues’ new paper on using state-of-the-art deep neural network (DNN) models to investigate the neuro-mechanisms of speech perception. This 🧵 explores our thoughts (🤍 & ❔) www.nature.com/articles/s41...
nature.com
Dissecting neural computations in the human auditory pathway using deep neural networks for speech - Nature Neuroscience
Using direct intracranial recordings and modern speech AI models, Li and colleagues show representational and computational similarities between deep neural networks for self-supervised speech learnin...
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Cogan Lab @coganlab.bsky.social · 27/03/2024
Last week, Kumar Duraivel (Senior PhD candidate) presented Matt Leonard, Laura Gwilliams, and colleagues paper on neuronal mechanisms of speech perception in the STG using state-of-the-art ultrahigh-density Neuropixel probes. This 🧵 explores our thoughts (🤍 & ❔) www.nature.com/articles/s41...
nature.com
Large-scale single-neuron speech sound encoding across the depth of human cortex - Nature
High-density single-neuron recordings show diverse tuning for acoustic and phonetic features across layers in human auditory speech cortex.
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Cogan Lab @coganlab.bsky.social · 13/03/2024
This week, Brooke Sevchik (senior undergraduate student) explored Luque and Morgan-Short's paper on the relationship between cognitive control and second language proficiency. This 🧵 explores our thoughts (🤍 & ❔) www.sciencedirect.com/science/arti...
sciencedirect.com
The relationship between cognitive control and second language proficiency
In the past 20 years, the field of bilingualism has made a substantial effort to better understand the set of cognitive mechanisms that allow bilingua…
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