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Illustrative examples of the bias in the absolute preference function when females were presented with 2 (top panel) or 10 (lower panels) males per female. Results are for a single combination (1000 replicates) in which heritability of preference (x) was set at 0.5. White histograms show estimated heritability based on the assigned male value. Gray histograms show the estimate obtained using the actual preference value of each female.
