To assess whether the CCDFs of the several types of texts we take into account show significant differences, we use the Kolmogorov-Smirnov goodnessof-fit test, which specifically targets cumulative distribution functions.
for each phonetic device and dataset, we use a two-tailed Kolmogorov-Smirnov test (again with Bonferroni correction) to test whether the number of examples above the threshold is higher in the persuasive sentences than in their non-persuasive counterparts for that device.