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The identification of structures in connection matrices of palmar dermatoglyphic variables



The identification of structures in connection matrices of palmar dermatoglyphic variables



Acta Anthropogenetica 3(3-4): 93-126



Structure-seeking techniques were applied to dermatoglyphic variables from samples of human populations in the North Pennine Dales, northern England [UK], including 1624 males and 1788 females. Results of multivariate analyses on 50 palmar variables are included; details on the fingers were reported earlier. Previous work disclosed low associations between palm and finger variables. The palmar variables include 3 interdigital ridge counts, 13 topological patterns, deltas ef, t, t', t" and tb and the 4 mainlines A, B, C and D for each hand. Two ordinal coding schemes were used for the mainlines in order to process blind terminations of the proximal radiants. A nascent scheme treats blind terminations of lines as embryonic and of low rank; a sequential scheme interprets them as acute reflections of the proximal radiants to source, attributing to them a correspondingly higher rank. Analyses have been effected by way of non-metric scaling algorithms and factoring techniques on ordinal connection matrices for each sex. Solutions are displayed as non-metric 2-dimensional scaling plots of the variables on which are superimposed non-hierarchical partially overlapping clusters of varimax rotated factors. Results are in agreement for nascent and sequential coding schemes depicting 11 non-overlapping and 3 overlapping clusters. The latter comprise interdigital variables, namely lines B, C and D, patterns III, IIIT and IV and ridge count bc. Subsequent ordination revealed consistent relationships in this group, clear variable homolog linkages and distinct bilateral clusters; and a distinctly less compact assortment of left hand as opposed to right hand variables.

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