LAMSAS in the Netherlands

Worksheet effect

Limiting ourselves to data of one informant (because of the fieldworker effect), we notice that our measurements are effected by worksheets.

subset:        fieldworker: Lowman
               worksheets: all
               826 informants
grouping:      fieldworker + worksheet + community: 426 locations
                   (two locations merged because of identical coordinates)
maps:          clustering, Ward's method

Lexical differences

The existence of a worksheet effect on measuring differences of lexical choice is to be expected. Different questions prompt the informant to different alternatives.

data:          lexical items
method:        Gewichteter Identitätswert

With only three clusters, the Preliminary South Atlantic worksheet stands out as a single cluster, with only very few exceptions:

With a division into seven clusters, there is a strong suggestion of a worksheet effect between Middle Atlantic and South Atlantic:

Phonetic differences

Strangely enough, there seems to be a worksheet effect in the phonetic data. With all lexical variants removed and all data transcribed be a single fieldworker, this effect is unexpected. Perhaps our method is too susceptible for secondary effects, such as word frequencies, although we try to compensate for that effect by normalisation.

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

With only four clusters, hints appear of an effect of all three major worksheets used by Lowman:

With seven clusters, a worksheet effect between Middle Atlantic and South Atlantic is evident:

With eleven clusters, a nearly complete worksheet effect for the Preliminary South Atlantic appears:

Guy Lowman
Traditional maps
Fieldworker effect
	Fitting
Worksheet effect
	Fitting
To do