The data for SyHD will be attained using multivariate surveys that include direct and indirect survey techniques, combining the advantages of both methods.

The indirect survey using a questionnaire serves as a first and comprehensive exploration of the geographical area of the survey, which, up until now, had not been studied with regards to syntax at all. This provides an optimal preparation for the direct survey: the data collected in the indirect survey form the basis for the creation of the questionnaire used in the direct survey. 

The data collected directly in interview-format serve as the primary, and most important, sources of data. By comparing them to the indirectly collected data, they are placed in a further context. The direct survey will be carried out by interviewers (explorators) with a background in linguistics.  

More detailed information about the surveys that have already been completed is coming soon.