Examination skills ... computer-based assessment has not dented the strong demand for teacher-based evaluation. Photograph: John E Fletcher and Anthony B Stewart/Corbis
Computer-based testing has made big advances in English language assessment in recent years, but the future remains bright for human examiners.
Last year the Ielts test of English was taken over 1.5m times and the speaking and writing sections of the test were evaluated by up to 5,500 examiners who assessed candidates in one-to-one interviews or read and marked their scripts.
Cambridge Esol, which is part of the consortium responsible for Ielts, produces its own suite of English language exams and employs either directly, in the UK, or via local tests centres, about 15,000 examiners to carry out face-to-face oral assessment and to mark written work for exams ranging from tests for young learners to its advanced-level certificate.
So the demand for examiners remains strong, but what can humans bring to assessment that computers can't?
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