Hemispheric Lateralization of Visuospatial Attention Is Independent of Language Production on Right-Handers: Evidence From Functional Near-Infrared Spectroscopy

It is well-established that visuospatial attention is mainly lateralized to the right hemisphere, whereas language production is mainly left-lateralized. However, there is a significant controversy regarding how these two kinds of lateralization interact with each other. The present research used functional near-infrared spectroscopy (fNIRS) to examine whether visuospatial attention is indeed right-lateralized, whereas language production is left-lateralized, and more importantly, whether the extent of lateralization in the visuospatial task is correlated with that in the task involving language. Specifically, fifty-two healthy right-handed participants participated in this study. Multiple-channel fNIRS technique was utilized to record the cerebral hemodynamic changes when participants were engaged in naming objects depicted in pictures (the picture naming task) or judging whether a presented line was bisected correctly (the landmark task). The degree of hemispheric lateralization was quantified according to the activation difference between the left and right hemispheres. We found that the picture-naming task predominantly activated the inferior frontal gyrus (IFG) of the left hemisphere. In contrast, the landmark task predominantly activated the inferior parietal sulcus (IPS) and superior parietal lobule (SPL) of the right hemisphere. The quantitative calculation of the laterality index also showed a left-lateralized distribution for the picture-naming task and a right-lateralized distribution for the landmark task. Intriguingly, the correlation analysis revealed no significant correlation between the laterality indices of these two tasks. Our findings support the independent hypothesis, suggesting that different cognitive tasks may engender lateralized processing in the brain, but these lateralized activities may be independent of each other. Meanwhile, we stress the importance of handedness in understanding the relationship between functional asymmetries. Methodologically, we demonstrated the effectiveness of using the multichannel fNIRS technique to investigate the hemispheric specialization of different cognitive tasks and their lateralization relations between different tasks. Our findings and methods may have important implications for future research to explore lateralization-related issues in individuals with neural pathologies.

Cerebral White Matter Mediation of Age-Related Differences in Picture Naming Across Adulthood

As people age, one of the most common complaints is difficulty with word retrieval. A wealth of behavioral research confirms such age-related language production deficits, yet the structural neural differences that relate to age-related language production deficits remains an open area of exploration. Therefore, the present study used a large sample of healthy adults across adulthood to investigate how age-related white matter differences in three key left-hemisphere language tracts may contribute to age-related differences in language ability. Specifically, we used diffusion tensor imaging (DTI) to measure fractional anisotropy (FA) and radial diffusivity (RD) which are indicators of white matter structure. We then used a series of path models to test whether white matter from the superior longitudinal fasciculus (SLF), the inferior longitudinal fasciculus (ILF), and the frontal aslant tract (FAT) mediated age-related differences in one form of language production, picture naming. We found that FA, as well as RD from the SLF and FAT mediated the relation between age and picture naming performance, whereas a control tract (corticospinal; CST) was not a mediator. Moreover, differences between mediation of picture naming and a control naming condition suggest that left SLF has a greater role in higher-order aspects of naming, such as semantic and lexical selection whereas left FAT is more sensitive to sensorimotor aspects of fluency or speech motor planning. These results suggest that dorsal white matter contributes to age-related differences in generating speech and may be particularly important in supporting word retrieval across adulthood.

A Small Island With Big Differences? Folk Perceptions in the Context of Dialect Levelling and Koineization

This paper presents the results of the first study within a perceptual dialectology framework in the Greek-speaking community in Cyprus. Thirty participants from three age groups of equal size took part in a sociolinguistic interview. As part of the language module component of the interview, they discussed their beliefs about regional variation in Cyprus and completed the so-called ‘draw-a-map task’. All participants were residents of urban areas of Nicosia, the capital of Cyprus. The Greek-speaking community in Cyprus is diglossic: Standard Modern Greek is the High variety, while Cypriot Greek—the mother tongue of Greek Cypriots—is the Low variety. The latter is currently undergoing levelling of marked local basilect features and subvarieties. A quantitative analysis of the maps demonstrates that some areas in Cyprus (mainly in the periphery) have a stronger sociolinguistic salience than others. At the same time, the participants’ own way of speaking is perceived as unmarked, neutral and one that enjoys wider acceptance over other regional dialects. This study also shows a clear preference for characterizing a (presumed) dialect area with linguistic characteristics, rather than with evaluative commentary contra many similar studies in the literature and suggests a number of reasons why this may be so. Overall, this research shows how studies on language perception can inform and complement studies on language production in a given community. The participants drew an average of just four regional areas on their maps and viewed the different cities and their districts, or combinations thereof, as the different regional dialect areas they perceive to exist in Cyprus. It is argued in this paper that the small number of areas drawn and the emphasis on urban sites are consistent with regional dialect levelling. Consistent with regional dialect levelling is also the finding that the participants’ linguistic description of regional variation, while mainly accurate, is superficial and lacks detail. Interestingly, many of the participants also seem to be well aware of regional dialect levelling in their community. Other studies in the literature do not really discuss speakers’ awareness of levelling and this should be further explored in future studies.

Stage Monologue and its Linguistic Features (Textual and Prosodic Analysis)

Spoken language production is considered to be one of the most difficult aspects of teaching a foreign language. It usually involves mastering pronunciation of sounds and intonation. If nowadays many teachers do not worry about the phonetic details of sounds, there is still focus on intonation as it has a great impact on the comprehensibility of the learner’s English. This is a very important issue for future teachers because correctness of pronunciation is one of the goals of any spoken language programme, with students asked to produce quite extended spoken monologues and to follow the requirements of various intonational styles. The aim of this study is to analyse textual and prosodic characteristics of stage monologue – a text produced on a theatre stage or in a film. Analytical methods were applied in order to obtain information about textual features and prosodic stylistic markers such as pitch level, range, tone modifications, loudness, and tempo, and also to develop style-forming factors in stage monologue. Results show that the stage monologues analysed possess all necessary characteristics of a text: informational content, delimitation, continuum, coherence, cohesion and completeness. Further analysis of stage monologue showed that it can be characterised by such specific features as expressiveness, normativeness, effectiveness, and conversational character. Stage monologues also possess all necessary prosodic markers. Certain style-forming factors of stage monologue were also developed in this study, including delimitation, accentuation of key words, thematic centres and expressively prominent centres, type of composition scheme, and theme. These results will be of significant pedagogical value to students who intend to become English teachers, and to teachers involved in linguistics research.

Context Effects in Bilingual Language Processing

Previous studies show that the presence of a context word in picture naming either facilitates or interferes with the naming. Although there has been extensive research in this area, there are many conflicting findings, making it difficult to reach firm conclusions. This chapter aims to delve into the dynamics of such processing and understand the nuances involved in experimental manipulations that may influence the pattern of results and be responsible for differences in outcomes. The series of experiments reported in this chapter was aimed at refining our understanding of mechanisms in the way bilinguals process language production by examining two different paradigms—primed picture naming and picture-word interference. This was investigated by manipulating both the type of visual context words presented with the picture and the time interval between the presentation of context word and picture. The results are interpreted within the context of current models of lexical access.

FACE-SAVING AND FACE-THREATENING NEGOTIATION BY LECTURERS: GENDER AND TEACHING EXPERIENCE DIFFERENCES

Teachers’ use of language was believed to give impact for the success of language learners in one way or another. As some teachers’ speech included managing classroom, giving instructions, and providing feedbacks, it is inevitable that a teacher would use the power and make the students uncomfortable. To soften the speech or lessen the impact to the students, a teacher could use some strategies of politeness inside the classroom. Seeing how linguistic politeness manifested by teachers could generally affect the students’ esteem, this study aimed at observing face-threatening and face-saving utterances produced by six lecturers during 6 different lessons in a state university. Combining Brown and Levinson’s theory of politeness and Yule’s concept of face, this study would also contrast the language production by lecturers of different gender and different length of teaching experience to find out if they were correlated. Under the qualitative method, the researcher carried out class observation, recorded the interaction, and transcribed all of the lecturers’ utterances. This study revealed that lecturers generally tend to manage more face-saving acts. However, it showed that most face-threatening utterances were generated by male lecturers. It also indicated that lecturers with longer teaching experience produced more face-threatening utterances, and lecturers with shorter teaching experience produced more face-saving utterances. The fact that female lecturers in this study were dominant in negotiating face-saving acts justified women are more polite than men.

Scoring Second Signed Language Assessment

There exists a scarcity in signed language assessment research, especially on scoring issues and interrater reliability. This chapter describes two related assessment instruments, the SLPI and the NFA, which offer scoring criteria. Raters are provided with scales for evaluating the different components of the language production of the candidate. Through its use, the rating system has been proved successful; there is, however, hardly any data on interrater reliability. In this chapter, the authors describe reliability issues with attention to raters’ training and score resolution techniques and discuss how to identify and increase rater reliability. The dearth of knowledge on signed language assessment, and in particular its validity and reliability, indicates an urgent need for more research in this area.

Assessing lexical-semantic naming deficits using an automated machine learning approach

After left hemisphere stroke, 20-50% of people experience language deficits, including difficulties in naming. Naming errors that are semantically related to the intended target (e.g., producing “violin” for picture HARP) indicate a potential impairment in accessing knowledge of word forms and their meanings. Understanding the cause of naming impairments is crucial to better modeling of language production as well as for tailoring individualized rehabilitation. However, evaluation of naming errors is typically by subjective and laborious dichotomous classification. As a result, these evaluations do not capture the degree of semantic similarity and are susceptible to lower inter-rater reliability because of subjectivity. We investigated whether a computational linguistic measure, word2vec (Mikolov, Chen, Corrado, & Dean, 2013) addressed these limitations by evaluating errors during object naming in a group of patients during the acute stage of a left-hemisphere stroke (N=105). Pearson correlations demonstrated excellent convergent validity of word2vec’s semantically related estimates of naming errors and independent tests of access to lexical-semantic knowledge (p’s < .0001). Further, multiple regression analysis showed word2vec’s semantically related estimates were significantly better than human error classification at predicting performance on tests of lexical-semantic knowledge (p < .001). Useful to both theorists and clinicians, word2vec provides an automated, continuous, and objective psychometric measure of access to lexical-semantic knowledge during naming.