Inappropriately chooses lay terminology when technical terminology is appropriate. Uses technical terminology incorrectly. Generally makes the appropriate choice of lay language or technical language. Uses technical terminology correctly. Technical language or lay language is appropriately selected.
Usage is precise, appropriate, parsimonious and enlightening.
Grammatical errors substantially detract from the communication. Grammatical errors are minimal and do not detract from the communication. The document is free of grammatical errors. V. APA Style 1. Several features of APA style are ignored.