In earlier work with the writing instruction application, "Writer's Workbench," some features associated with style were evaluated, including: average word length, the distribution of sentence lengths, grammatical types of sentences (e g, simple and complex), the percentage of passive voice verbs, and the percentage of nouns that are nominalizations (see MacDonald et al, 1982 for a complete description of the Writer's Workbench).
to a subjective measure such as, repetitive word usage, the stylistic features in the Writer's Workbench are not subjective.