Dr John Campbell, Head of Department of Sociology an Anthropology, School of Oriental and African Studies [SOAS] produced a report concerning the UK Border Agency's [UKBA] use of Language Analysis in asylum cases.
The UKBA states that the purpose of their analysis is to properly determine the place of origin for asylum seekers. Dr Campbell spent time examining the process, the procedures, as well as linguists' claims of being experts.
Dr Campbell concludes that the process is not objective and is fundamentally political. It is based on flawed assumptions about language, and on subjective, rather than objective, criteria. There is also very little empirical evidence to support language analysis.
It is an invaluable read for anyone dealing with asylum cases. The full report can be found here.