In our experiments, the development-set similarity using the harmonic mean in the additive MI-based CRM was 0.312 for high-frequency nouns and 0.153 for low-frequency nouns, and the development-set similarity using the harmonic mean in the additive t-test based CRM was 0.294 for high-frequency nouns and 0.129 for low-frequency nouns.
features that are shared to a similar extent are considered more important in the calculation of distributional similarity.