Null pronoun variation in Mexican-descent children's narrative discourse

In Spanish, subject pronouns may be realized phonetically or as null. Previous research on a wide range of dialects has established a rich patterning of constraints on this variation, with switch reference as the first order linguistic constraint. Recently, however, Paredes Silva (1993), in a study of written Brazilian Portuguese, suggested a more fine-grained analysis of null subject pronoun variation based on a model of discourse connectedness. This study tests Paredes Silva's model on the oral and written Spanish narratives of northern California Mexican-descent preadolescents. Results of multivariate analysis indicate that discourse connectedness provides a more fine-grained account of pronoun variation in the Spanish of these children than switch reference. The study also considers the effect of morphological ambiguity. We suggest that tense and aspect features provide a better explanation for the higher incidence of overt pronouns with imperfect, conditional, and subjunctive verb forms than the functional compensation hypothesis. Finally, we examine pronoun variation across immigrant generations. The results indicate that children with the greatest depth of ties to the United States are less likely to use overt pronouns than children born in Mexico.