MI Score

The Mutual Information score expresses the extent to which words co-occur compared to the number of times they appear separately. MI Score is affected strongly by the frequency, low-frequency words tend to reach a high MI score which may be misleading.

This is why Sketch Engine allows setting a frequency limit so that low-frequency words can be excluded from the calculation.

When comparing the T-score and MI score, in most cases T-score is more useful than MI score. However, both of these scores are affected by the corpus size. This makes them less useful when working with modern mutli-billion-word corpora. This is why Sketch Engine prefers the LogDice score in most situations, especially in word sketches.

MI score can only be computed in the Collocation tool in the Concordance in Sketch Engine.

see Concordance – Collocations
see Statistics in Sketch Engine