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This paper presents the results of a sociolinguistic survey of the Northern Thai varieties spoken in six provinces of Northern Thailand. The purpose of this survey was to determine whether the variety of
Northern Thai currently being used for literature development will be adequate for Northern Thai
speakers in all of these six provinces, and if not, which varieties should be selected for further
development. The researchers conducted brief sociolinguistic questionnaires and modified recorded text
tests to investigate sociolinguistic attitudes. The data for this survey was collected in 12 randomly
selected sub-districts in 6 provinces of Northern Thailand between December 2011 and February 2012.