Morphological Knowledge as an Aid to Word Learning: A Cross-Situational Word Learning Study

The present study explores morphological bootstrapping in cross-situational word learning. Adult, English-speaking participants were exposed to novel words from an artificial language from three different semantic categories: fruit, animals, and vehicles. In the Experimental conditions, the final CV syllable was consistent across categories (e.g., /-ke/ for fruits), while in the Control condition, the endings were the same, but were assigned to words randomly. After initial training on the morphology under various degrees of referential uncertainty, participants were given a cross-situational word learning task with high referential uncertainty. With poor statistical cues to learn the words across trials, participants were forced to rely on the morphological cues to word meaning. In Experiments 1-3, participants in the Experimental conditions repeatedly outperformed participants in the Control conditions. In Experiment 4, when referential uncertainty was high in both parts of the experiment, there was no evidence of learning or making use of the morphological cues. These results suggest that learners apply morphological cues to word meaning only once they are reliably available.

Influence of causal language on causal understanding: A comparison between Swiss-German and Turkish

Young children have difficulties understanding untypical causal relations. While we know that hearing a causal description facilitates this understanding, less is known about what particular features of causal language are responsible for this facilitation. Here, we asked: (1) Do syntactic and morphological cues in the grammatical structure of sentences facilitate the extraction of causal meaning, and (2) do these different cues influence this facilitation to a different degree. We studied children learning either Swiss-German or Turkish, two languages which differ in their expression of causality. Swiss-German predominantly uses lexical causatives (e.g., schniidä (cut)), which lack a formal marker to denote causality. Turkish, alongside lexical causatives, uses morphological causatives, which formally mark causation (e.g., ye (eat) vs. yeDIr (feed)). We assessed 2.5- to 3.5-year-old children’s understanding of untypical cause-effect relations described with either non-causal language (e.g., Here is a cube and a car) or causal language using a pseudo-verb (e.g., lexical: The cube gorps the car). We tested n = 135 Turkish-learning (non-causal, lexical, and morphological conditions) and n = 90 Swiss-German-learning children (non-causal and lexical conditions). Children in both language groups performed better in the causal language condition(s) than the non-causal language condition. Further, Turkish-learning children’s performance in both the lexical and morphological conditions was similar to Swiss-German-learning children in the lexical condition, and did not differ from each other. These findings suggest that the structural cues of causal language support children’s understanding of untypical causal relations, regardless of the type of construction.

Shining a Light on Race: Contrast and Assimilation Effects in the Perception of Skin Tone and Racial Typicality

Researchers have long debated the extent to which an individual’s skin tone influences their perceived race. Brooks and Gwinn (2010) demonstrated that the race of surrounding faces can affect the perceived skin tone of a central target face without changing perceived racial typicality, suggesting that skin lightness makes a small contribution to judgments of race compared to morphological cues (the configuration and shape of the facial features). However, the lack of a consistent light source may have undermined the reliability of skin tone cues, encouraging observers to rely disproportionately on morphological cues instead. The current study addresses this concern by using 3D models of male faces with typically Black African or White European appearances that are illuminated by the same light source. Observers perceived target faces surrounded by White faces to have darker skin than those surrounded by Black faces, particularly for faces of intermediate lightness. However, when asked to judge racial typicality, a small assimilation effect was evident, with target faces perceived as more stereotypically White when surrounded by White than when surrounded by Black faces at intermediate levels of typicality. This evidence of assimilation effects for perceived racial typicality despite concurrent contrast effects on perceived skin lightness supports the previous conclusion that perceived skin lightness has little influence on judgments of racial typicality for racially ambiguous faces, even when lighting is consistent.

Differences between grammatical gender and semantic gender in pronominal antecedent retrieval in Brazilian Portuguese

Coreference is a syntactic dependency in which pronouns are bound to previous referents in discourse. Granted that antecedents of anaphors must be retrieved from memory in coreference, the aim of this research is to provide more information on how pronominal antecedents are retrieved, and more precisely to clarify the role of gender cues in pronominal antecedent retrieval when gender morphology is overt. Since Portuguese is a language with visible morphology, speakers of this language are used to rely on agreement cues to process language. The results of two eye-tracking experiments conducted with native speakers of Brazilian Portuguese demonstrated that both binding structural constraints and gender morphological cues are equally important in antecedent retrieval in memory throughout processing. In addition, the results indicated that semantic gender seemed to weigh more in memory than grammatical gender since structurally unacceptable candidates carrying semantic gender caused more interference effects than grammatical gender.

Gender Assignment to Spanish Pseudowords by Monolingual and Basque-Spanish Bilingual Children

This study examines gender marking in the Spanish of Basque-Spanish bilingual children. We analyze data collected via a production task designed to elicit 48 DPs, controlling for gender of referents and for number and types of morphological cues to grammatical gender. The goals were to determine the extent to which participants rely on biological cues (female referent =>FEM gender, male referent =>MASC gender) and morpho-phonological cues (-a ending =>FEM, -o ending =>MASC, others =>MASC or FEM) to assign gender to pseudowords/novel words; and whether bilinguals’ language dominance (Spanish strong/weak) has an effect. Data were collected from 49 5- to 6-year-old Spanish-speaking children—28 monolingual L1 Spanish (L1Sp) and 21 Basque-dominant (L1 Basque-L2 Spanish) bilinguals (BDB). Results reveal a general preference for MASC gender across conditions, especially in BDB children, who produced masculine modifiers for 83% of items, while the L1Sp children did so for only 63% of items. Regression analyses show that for both groups, morphological cues have more weight than the nature of the referent in participants’ assignment of gender to novel words, and that the L1Sp group is more attentive to FEM morphological markers than the BDB group, pointing towards the existence of differences in the strength of cue-patterns for gender marking.

QUANTIFICATIONAL CUES MODULATE THE PROCESSING OF ENGLISH SUBJECT-VERB AGREEMENT BY NATIVE CHINESE SPEAKERS

Numerous studies have demonstrated that native Mandarin speakers have pervasive difficulties processing L2 English agreement morphology. However, less is known about the lexical and morphological cues that may modulate Mandarin speakers’ sensitivity to English number agreement. To investigate this, we examined subject-verb agreement processing in English by L1 Mandarin participants using event-related brain potentials (ERPs) and focused on the use of quantificational cues to noun number and their interaction with agreement morphology on the verb. Previous work in English monolinguals has shown that agreement violations elicited larger P600s when preceded by a plurally quantified subject noun phrase (NP) compared to an unquantified NP. In the present study, Mandarin speakers were tested on the same quantified and unquantified sentences (e.g.,Most/The cookiestaste/*tastes…) as in the prior work. Like the L1 English speakers, ERPs time-locked to the verb showed a reliable P600 in response to agreement violations. However, the P600 in Mandarin speakers was larger for ungrammatical verbs withunquantified subjects, a contrast with English monolinguals. First, these results demonstrate that L2 agreement violations can elicit qualitatively similar neural responses in L1 Mandarin speakers as in English monolinguals (P600 effects), a finding that is to our knowledge novel. Second, quantification modulated the P600 in the L2 speakers in a qualitatively different way than in natives. Overall, these findings suggest stronger reliance on lexical versus morphological cues to number in Mandarin speakers, and that this impacts anticipation of subsequent grammatical features.

Racial bias in face perception is sensitive to instructions but not introspection

Faces with typically African features are perceived as darker than they really are. We investigated how early in processing the bias emerges, whether participants are aware of it, and whether it can be altered by explicit instructions. We presented pairs of faces sequentially, manipulated the luminance and morphological features of each, and asked participants which was lighter, and how confident they were in their responses. In Experiment 1, pre-response mouse cursor trajectories showed that morphology affected motor output just as early as luminance did. Furthermore, participants were not slower to respond or less confident when morphological cues drove them to give a response that conflicted with the actual luminance of the faces. However, Experiment 2 showed that participants could be instructed to reduce their reliance on morphology, even at early stages of processing.