UCL Psychology and Language Sciences


Prof Mairead Macsweeney

Prof Mairead Macsweeney


Institute of Cognitive Neuroscience, UCL
17 Queen Square


  • Professor of Cognitive Neuroscience
    Institute of Cognitive Neuroscience
    Div of Psychology & Lang Sciences

Joined UCL


Research Themes

I explore how the brain processes language in people who are born profoundly deaf. Exploring the brains of adults who have had very different sensory and language experience from the norm allows a unique perspective on how experience shapes the brain. Working with deaf volunteers is the only way to address a number of important questions in cognitive neuroscience. For example, using fMRI we have shown that when auditory input is absent from birth, auditory parts of the brain can they be taken over to process input from other senses, such as vision. We have also shown that the brain engages very similar networks to process signed and spoken language. This suggests that the brain treats language as language, regardless of whether it comes in via the eyes or the ears. Such advances are not only of theoretical interest, but may also have important practical implications for how we educate deaf children. In my current research, funded by the Wellcome Trust, I am examining the impact of late sign language acquisition on language processing. I am testing the hypothesis that the neural circuitry recruited for language processing is dependent upon age of language acquisition and is affected by first language experience. I am also exploring the implications of altered sensory and language experience for reading and the neurobiological basis of reading. Despite normal non-verbal IQ, the average deaf child leaves school with a reading age of nine-years. I will test the hypothesis that reading can build upon a visual-spatial language. Literacy correlates with sign language proficiency; however, the sign-related skills that may facilitate this relationship are unclear. I predict this facilitation may result from: a) overlap in the neural systems supporting fingerspelling and orthographic processing and b) overlap in the neural systems recruited by sublexical processing of sign and speech.

Keywords: Brain, Brain imaging, Cognition, Cognitive, Sign language, Dyslexia, Hearing, fMRI, ERP, Language, Neuroimaging, Plasticity, Crossmodal, Speech, Hearing impairment

Conditions: Deafness

Methods: Functional MRI (fMRI), Behavioural analysis, Electroencephalography (EEG)

Award year Qualification Institution
1998 PhD
Doctor of Philosophy
University College London
1993 BSc
Bachelor of Science
University of Northumbria at Newcastle


Behavioural analysis|*|Brain|*|Brain imaging|*|Cognition|*|Cognitive|*|Crossmodal|*|Deafness|*|Dyslexia|*|ERP|*|Electroencephalography (EEG)|*|Functional MRI (fMRI)|*|Hearing|*|Hearing impairment|*|Language|*|Language processing in deaf adults|*|Neuroimaging|*|Plasticity|*|Sign language|*|Speech