In Italian, null pronouns are typically interpreted toward antecedents in a prominent syntactic position, whereas overt pronouns prefer antecedents in lower positions. Interpretation preferences in Spanish are less clear. While comprehension and production have never been systematically compared in Italian and Spanish, here we look at the preferences for overt- and null-subject pronouns in the two languages using the same production and comprehension materials. Using an offline comprehension task with a group of Spanish and Italian speakers, we tested sentences where the type of pronoun (null vs. explicit) and position of the pronoun (anaphoric vs. cataphoric) are manipulated, to determine how context affects speakers’ interpretations in the two languages. With two production tasks, we measured referential choice in controlled discourse contexts, linking the production patterns to the differences observed in comprehension. Our results indicate microvariation in the two null-subject languages, with Spanish following the Position of Antecedent Hypothesis but to a lesser degree than Italian. More specifically, in Spanish, the weaker object bias for overt pronouns parallels with a higher use of overt pronouns (and with fewer null pronouns) in contexts of topic maintenance.

Several studies have highlighted the role of cross-linguistic influence in determining the over-use of overt subject pronouns in near-native speakers of a null-subject language as Italian. In this work we inquire on the role of factors different from cross-linguistic influence in the choice of anaphoric devices in near-natives, such as age of onset of exposure and dominance. In order to do so, comparing the productions of two groups of natives speakers, we first single out two null-subject languages, Italian and Greek, which do not differ significantly as far as subject anaphoric devices are concerned and thus instantiate a suitable language combination to investigate the role of factors other than cross-linguistic influence in bilingual speakers of these two languages (Study 1). In Study 2, we compare the productions of a group of native speakers and two groups of near-native speakers in Italian: Greek-Italian bilinguals from birth and L2ers of Italian with Greek as an L1. Results reveal that over-use of overt pronouns in near-natives occurs in the absence of cross-linguistic influence and that age of onset of exposure is a relevant factor: while bilinguals from birth do not differ from native speakers, L2ers over-use overt pronouns compared to both native speakers and bilinguals from birth. In order to establish whether dominance is a possible factor determining bilinguals’ choice of subject anaphoric devices, in Study 3, we compare two groups of Greek-Italian bilinguals from birth: bilinguals living in Greece (whose predominant language is Greek) and bilinguals living in Italy (whose predominant language is Italian). Results reveal no effect of dominance in the production of overt subject pronouns. We found, however, an unexpected effect in the predominant language of one group: bilinguals living in Greece produce significantly more null pronouns and less lexical DPs in Greek compared to bilinguals living in Italy. We interpret this effect as stemming from the need to differentiate the two languages that these bilingual speakers have to handle in everyday life. Interestingly, this effect is found in the predominant language rather than in the non-predominant one.

Maintaining insoluble plant-based ingredients in suspension and ensuring long-term physical stability is particularly challenging for formulators of green cosmetics. This study aimed to evaluate the structure and applicative properties of gel and gel-cream topical formulations suitable for delivering an insoluble phytocomplex on the vaginal mucosa and maintaining its integrity. For this purpose, we studied the compatibility of Perilla frutescens (L.) Britton phytocomplex (PFP), derived from in vitro plant cell cultures and presented as a powder finely dispersed in glycerin, with different classes of natural rheological modifiers (such as xanthan gum, sclerotium gum, succinoglycan, xyloglucan, diutan gum, hydroxypropyl guar gum derivative) in gel and gel-cream formulations, to meet the needs of the cosmetic market for naturalness and biodegradability. Through rheological and texture analyses, we studied the physico–mechanical properties of the samples, comparing the performances of the chosen polysaccharides to those of acrylic polymeric rheological modifiers, evaluating their contribution in terms of stability and applicative properties. Since a weak-gel rheological pattern proved to be the optimal one to keep the actives in suspension, the associations of tamarind seed polysaccharides with succinoglycan or scleroglucan were the most suitable for the formulation of mucoadhesive gels.

In this introduction to the Special Collection of the same title, we start out by discussing some key issues addressed by recent research on micro-variation in subject realization and interpretation in anaphoric contexts (Section 1). This includes the status of some subject anaphoric devices in null vs. non-null subject languages, the possibility of micro-variation among null subject languages, and the way in which L2 speakers, elderly speakers and children deal with the task at stake and the factors that may influence this process. Then, we briefly summarize the seven contributions to this collection (Section 2) and relate the findings of each contribution to one another as well as to previous research (Section 3). As a whole, the studies in this collection not only shed light on many of the above mentioned issues, but they also raise novel research questions that open new perspectives of investigation into the choice and interpretation of subject referring expressions.

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