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Correspondence
Analysis (CA) offers a proven algorithm for seriation. The
eigenvalue-solution can be displayed in a coordinate system
for showing the well known arch or parabola effect. There
are serious obstacles for the use of these eigenvalues -or
the differences between them- as arguments for phasing Petrie-matrices.
Detrendet Correspondence Analysis (DCA) is an alternative
algorithm, widely used in ecology, but not yet for seriation.
DCA allows one to obtain an eigenvalue-solution different
from that of CA, designed especially for eliminating the parabola
effect. Displayed in a coordinate system the DCA eigenvalues
allow a sounder procedure of phasing by measuring equally
scaled distances. An example from the early Neolithic Mid-European
Linearbandkeramik will show that these distances can be used
as a measure of culturally represented time: The scaling of
the DCA-solution leads to a general scale as an independent
tool for quantifying changes in material culture by explicit
archaeological means.
Key words: correspondence analysis, detendet correspondence
analysis, seriation, phasing, Bandkeramik
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