All the three variables were found to influence the rating scores of native speakers: χ 2 (1) = 347.83, p < .001 for 'relation'; χ 2 (1) = 173.31, p < .001 for 'combinability'; and χ 2 (1) = 4107.5, p < .001 for 'usage'.
characters with higher combinability radicals tended to be rated higher; characters whose meanings are still in use also received much higher scores.