Bilingualism caught in a net: A new approach to understanding the complexity of bilingual experience

The growing importance of research on bilingualism in psychology and neuroscience motivates the need for a psychometric model that can be used to understand and quantify this phenomenon. This research is the first to meet this need. We reanalyzed two data sets (N = 171 and N = 112) from relatively young adult language-unbalanced bilinguals and asked whether bilingualism is best described by the factor structure or by the network structure. The factor and network models were established on one data set and then validated on the other data set in a fully confirmatory manner. The network model provided the best fit to the data. This implies that bilingualism should be conceptualized as an emergent phenomenon arising from direct and idiosyncratic dependencies among the history of language acquisition, diverse language skills, and language-use practices. These dependencies can be reduced to neither a single universal quotient nor to some more general factors. Additional in-depth network analyses showed that the subjective perception of proficiency along with language entropy and language mixing were the most central indices of bilingualism, thus indicating that these measures can be especially sensitive to variation in the overall bilingual experience. Overall, this work highlights the great potential of psychometric network modeling to gain a more accurate description and understanding of complex (psycho)linguistic and cognitive phenomena

Nonword repetition depends on the frequency of sublexical representations at different grain sizes: evidence from a multi-factorial analysis

The nonword repetition task (NWR) has been widely used in basic cognitive and clinical research, as well as in clinical assessment, and has been proposed as a clinical marker for Specific Language Impairment (SLI). Yet the mechanisms underlying performance on this task are not clear. This study offers insights into these mechanisms through a comprehensive examination of item-related variables identified in previous research as possibly contributing to NWR scores and through testing the predictive power of each in relation to the others. A unique feature of the study is that all factors are considered simultaneously. Fifty-seven typically developing children were tested with a NWR task containing 150 nonwords differing in length, phonotactic probability, lexical neighbourhood and phonological complexity. The results indicate that phonological processing of novel words draws on sublexical representations at all grain sizes and that these representations are phonological, unstructured and insensitive to morphemehood. We propose a novel index – mean ngram frequency of all phonemes – that best captures the extent to which a nonword draws on sublexical representations. The study demonstrates the primacy of sublexical representations in NWR performance with implications for the nature of the deficit in SLI

Word knowledge and lexical access in monolingual and bilingual migrant children: Impact of word properties

Word knowledge and the speed of word processing in monolingual children and adults are influenced by word properties, such as the age of acquisition (AoA), imageability, and frequency. Understanding how different properties of words contribute to the ease of processing by bilingual children is a critical step for establishing models of childhood bilingualism. However, a joint impact of these properties has not been so far assessed in bilingual children. Here, we compared the impact of AoA, imageability, and frequency on accuracy and response times in picture naming and picture recognition tasks in monolingual and bilingual children. We used Cross-Linguistic Lexical Tasks to test 45 monolingual children (aged 4 to 7 years) and 45 migrant bilingual children in their L1 (Polish). Word AoA, imageability, and frequency independently affected the accuracy and response times in both picture naming and picture recognition tasks. Crucially, bilingual children were more sensitive to word characteristics than their monolingual peers: Bilingual children’s accuracy was particularly low for words of high AoA (in the picture recognition task) and for words of low frequency (in the picture naming task). Also, the increase in response times for low-imageable and low-frequent words was particularly salient in bilingual children. The results suggest a new area of interest for further studies: the question of whether bilinguals and monolinguals show different sensitivity to psycholinguistic factors, and if so, does that sensitivity change with age or language exposure

Perturbed γ-γ Angular Correlation Studies of Isostructural Ag5\text{}_{5}Zn8\text{}_{8} and Ag5\text{}_{5}Cd8\text{}_{8} Intermetallic Compounds

Perturbed γ-γ angular correlation spectroscopy was applied to study hyperfine interaction parameters for $\text{}^{111}$In probes in intermetallic compounds of D8$\text{}_{2}$ structure. The perturbed γ-γ angular correlation spectra measured in Ag$\text{}_{5}$Zn$\text{}_{8}$ and Ag$\text{}_{5}$Cd$\text{}_{8}$ phases reflect a number, population and symmetry of nonequivalent substitutional sites occupied by the indium probes. The temperature dependences of the observed electric field gradients were measured in the temperature range 37-500

Dwujęzyczność u progu edukacji szkolnej – interdyscyplinarny projekt badawczy

The paper describes a Polish research project which aims at creating a cognitive and linguistic profile of the Polish-English bilingual child at the school entrance age. With the increase in the number of bilingual children due to economic migrations, researchers, educators and practitioners are often faced with diagnostic dilemmas which arise from similarities in bilingual language acquisition in natural settings and Specific Language Impairment (SLI). The study, which aims at disentangling the effects of bilingualism from those of SLI, is a part of European cooperation programme COST Action IS0408/Bi-SLI. The aim of the Polish team is to create and test a set of tools which can be used for developing norms of typical bilingual development for Polish-English children entering school education

A Longitudinal Study of Memory Advantages in Bilinguals

Typically, studies of cognitive advantages in bilinguals have been conducted previously by using executive and inhibitory tasks (e.g. Simon task) and applying cross-sectional designs. This study longitudinally investigated bilingual advantages on episodic memory recall, verbal letter and categorical fluency during the trajectory of life. Monolingual and bilingual participants (n=178) between 35–70 years at baseline were drawn from the Betula Prospective Cohort Study of aging, memory, and health. Results showed that bilinguals outperformed monolinguals at the first testing session and across time both in episodic memory recall and in letter fluency. No interaction with age was found indicating that the rate of change across ages was similar for bilinguals and monolinguals. As predicted and in line with studies applying cross-sectional designs, no advantages associated with bilingualism were found in the categorical fluency task. The results are discussed in the light of successful aging