LAMSAS in the Netherlands

Guy Lowman

Because of a fieldworker effect, we have to restrict our analysis to data collected by a single informant. There may also be a worksheet effect, still visible in the maps below.

subset:        fieldworker: Lowman
               worksheets: Middle Atlantic, South Atlantic
               752 informants
grouping:      fieldworker + worksheet + community: 361 locations
                   (two locations merged because of identical coordinates)
triangulation: ignoring Preliminary South Atlantic worksheet
maps:          stochastic clustering, group average + weighted average,
                   followed by classical MDS on cophenetic differences

Phonetic

data:          raw phonetic strings, no lexical variants
method:        Levenshtein

data:          lexical strings
               removing infrequent variants, averaging from minimum
                   of two occurences per variant to twenty occurences,
                   skipping files with only one variant left
method:        Levenshtein

            local incoherence 
phonetic:   1.40311
lexical:    1.7686