In the present research, I dedicated myself to investigate data from the written language of Brazilian Portuguese (PB) from essays for admission to higher education of students of Pernambuco, Brazil. For that, a written language corpus of PB was constituted with 580 finite declarative contexts containing null and full subjects. The data were analyzed according to the Theory of Principles and Parameters (CHOMSKY, 1981) based on the Null Subject Parameter, referring to the filling of the subject position by full and null subjects in natural languages. In general terms, the data analyzed point to the fact that PB has presented a large index of full subjects, even in contexts of monitored writing.
