PredictiveHire uses between 40-60 different data points that go into the development of the prediction, and a number of those focus on the communication skills of an application.
At a high level these are the measures we consider in assessing communication skills:
Readability
Grammar Errors
Spelling errors
Sentence length
Diversity of vocabulary
Language sophistication (i.e. use of difficult words, language formality, critical thinking)
Use of parts of speech (how many verbs/nouns/pronouns etc used)
We also incorporate a number of internationally renowned tests and methods as part of this analysis, which include the Flesch-Kinkaid grade test, Coleman Liau Index, and SMOG index, amongst others.
You can find a more technical explanation of more of our Machine Learning methods here.