Figure 3.
The rates with which words are incorporated is independent of usage frequency. Each circle is a word's incorporation rate (circles have translucency of 30%). Linear regression finds no correlation between a word's usage count (in our whole sample) and the incorporation rate (two-tailed Pearson correlation coefficient: r2 = 0.00040, p = 0.54). The mean value of the word incorporation rate α is 0.0043, which we found to be significantly greater than zero (p = 0.0083, bootstrapping with 10 000 resamples of 100 values, and calculating the proportion of resamples with mean greater than zero). The high variance for very low frequencies is due to sampling effects. (Online version in colour.)