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This paper investigates the interpretation of overt and null subject pronouns in the heritage language (European Portuguese, EP) of Portuguese heritage bilinguals (children and teenagers) in Germany and Andorra with German (Ger) and Spanish/Catalan (Span/Cat) as environmental languages and compares it to the outcomes of age-matched monolingual Portuguese children and monolingual adults. The results of an offline sentence interpretation task show that all groups of speakers differentiate between overt and null subjects. They are also sensitive to the syntactic context (intrasentential vs. intersentential) and the directionality of the anaphoric relation (anaphoric vs. cataphoric), although to different degrees. We argue that the interpretation of differences between monolingual and bilingual speakers needs to take into account these different syntactic contexts of pronominal resolution in order to gain a better understanding of the role of language-internal factors and cross-linguistic influence (CLI). With respect to the latter, the comparison between the Ger-EP and the Span/Cat-EP groups reveals no differences between these populations and shows that for the speakers’ knowledge of anaphora resolution in EP it is not decisive whether the contact language is a null subject language or not (confirming thus the results in Sorace et al. 2009).
We aim to understand whether Greek and Italian, two null subject languages, differ in the use and interpretation of null subjects, based on evidence from both a production and a comprehension experiment. The results of the two experiments show that the two languages differ in the extent to which they comply with the Position of Antecedent Strategy as formulated by Carminati (2002). In order to account for this difference, we introduce a principle which defines prominence of sentence constituents in terms of hierarchical height, elaborating on a recent proposal by Rizzi (2018). Then we show that the prominence of subject and object constituents in Greek and Italian reflects word-order differences between the two languages (Roussou & Tsimpli 2006). In more general terms, this paper argues in favour of a multi-factorial approach to reference interpretation, in that syntactic factors interact with discourse factors, leading to a gradient variety of reference possibilities.