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Accuracy and power in fluctuating asymmetry studies: effects of sample size and number of within‐subject repeats
Author(s) -
Dongen S. Van
Publication year - 1999
Publication title -
journal of evolutionary biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.289
H-Index - 128
eISSN - 1420-9101
pISSN - 1010-061X
DOI - 10.1046/j.1420-9101.1999.00062.x
Subject(s) - sample size determination , biology , statistics , observational error , asymmetry , power (physics) , sample (material) , population , fluctuating asymmetry , sampling (signal processing) , statistical power , type i and type ii errors , evolutionary biology , mathematics , demography , computer science , physics , filter (signal processing) , quantum mechanics , sociology , computer vision , thermodynamics
This paper presents results from simulations investigating the effect of sample size, number of within‐subject repeats and relative degree of measurement error on the power and accuracy of test for fluctuating asymmetry (FA). These data confirm that sampling variation of population‐level FA‐estimates is large and that high sample size is required to obtain reasonably high power when testing for FA or comparing FA levels between populations. The results also clearly show that increasing the number of within‐subject repeats can dramatically increase accuracy and power when measurement error is relatively high.