- Presenting with aphasia as a result of the stroke. For those participants identified via United Kingdom National Health Service (two participant identification centers), this will be determined based on Speech and Language Therapist diagnosis. For participants recruited via the community, it will be based on their scores on the Frenchay Aphasia Screening Test (FAST). This test covers four major aspects of language: comprehension, expression, reading and writing. Aphasia is determined by published cut-off scores. Where a person has mild aphasia, such that they score as 'normal' on the FAST, but where the participant self-identifies as having aphasia, and this is confirmed by the clinical judgement of the Chief Investigator, they will be included.