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. 2006 Dec 20;1(1):e7. doi: 10.1371/journal.pone.0000007

Table 1. Analysis of measurement error.

graphic file with name pone.0000007.t001.jpg

Source Sums of Squares Degrees of freedom Mean Squares ×106
Individuals 0.1366 1846 74.0 ***
Sides 0.0015 26 57.0 ***
Individuals×sides 0.0307 1846 16.7 ***
Measurement error 1: Imaging 0.0015 3744 0.403 *
Measurement error 2: Digitizing 0.0028 7488 0.378

Procrustes analysis of variance [16] of the amounts of shape variation attributable to different sources, for the wings of 72 individuals that were photographed and digitized twice. Sums of squares and mean squares are in units of squared Procrustes distance.

*** P<0.001; * P<0.05