The accuracy of strategies for selecting events from NPRs depending on various parameters.

Parameter T denotes the filtering threshold and Δ denotes the noise level for generating sets of NPRs. Columns 3, 5, and 7 report the accuracy as measured by the average symmetric distance to the event set in the true gene history. Note that the bold-faced values indicate the method (among (a)s-median and random NPRs) having the symmetric distances of 1000 gene families being significantly less than that of the other methods, i.e. p-value of the paired t.test being less than 0.05. Columns 4, 6 and 8 report the average numbers of predicted , , and events with or without filtering. On average, the true evolutionary history of a gene family contains 13.7 ,, and events.