Abstract

Data collection in experimental linguistics is frequently conducted in laboratory rooms within a research institute, which can be difficult to reach for some participants, for example those with mobility issues or living further away and in remote areas. This article presents SPRAAKLAB, a mobile laboratory that facilitates the collection of high-quality acoustic and articulatory data outside of university walls, thus bringing the laboratory environment closer to the participants. We present an acoustic analysis of recordings collected inside and outside of the SPRAAKLAB, including transmission loss, signal-to-noise ratio and harmonics-to-noise ratio. All three measures reveal that the SPRAAKLAB is suitable for collecting consistent high-quality speech data even in loud environments. Finally, we discuss how the SPRAAKLAB allows us to collect data more easily and facilitates public outreach activities.

Abstract

Purpose: The purpose of this study was to assess differences between individuals treated for oral squamous cell carcinoma (ITOC) and control speakers on acoustic, kinematic and perceptual measures of speech. Furthermore, this study aimed to assess the interrelatedness of these speech domains alongside self-reported speech outcomes in order to inform clinically relevant measures of speech in ITOC.
 
Method: Simultaneous acoustic and kinematic data (via electromagnetic articulography sensors on the tongue) were collected from 9 ITOC, who received treatment for either a tumour located on the tongue or jaw, and 8 age- and sex-matched control speakers. All participants were native speakers of Dutch and read the North Wind and the Sun passage. We calculated the articulatory-acoustic vowel space (AAVS) from the acoustic data and the articulatory-kinematic vowel space (AKVS) from the tongue tip and tongue back sensor data. Inexperienced listeners (n=35) provided intelligibility and listening effort ratings using a visual analogue scale rating procedure. Self-reported speech problems were assessed using the Speech Handicap Index (SHI).
 
Results: Compared to an age- and sex-matched control group, ITOC demonstrated significantly worse speech outcomes across all speech domains. A principal component analysis of all speech outcome measures within the ITOC group showed that the acoustic, perceptual, and self-reported measures were most strongly associated with each other, and that acoustic and kinematic measures were not strongly associated with each other.
 
Conclusions: This study demonstrates the multifaceted nature of the speech problems in ITOC, as deficits were found across all speech domains. Acoustic and kinematic measures seem to provide disparate and complementary information considering the absence of a strong relationship between them. Our results thus underscore the importance of assessing the speech outcomes of ITOC across the acoustic, kinematic, perceptual, and self-reported domains to inform rehabilitation strategies.

Abstract

As legal case law databases such as HUDOC continue to grow rapidly, it has become essential for legal researchers to find efficient methods to handle such large-scale data sets. Such case law databases usually consist of the textual content of cases together with the citations between them. This paper focuses on case law from the European Court of Human Rights on Article 8 of the European Convention of Human Rights, the right to respect private and family life, home and correspondence. In this study, we demonstrate and compare the potential of topic modelling and citation network to find and organize case law on Article 8 based on their general themes and citation patterns, respectively. Additionally, we explore whether combining these two techniques leads to better results compared to the application of only one of the methods. We evaluate the effectiveness of the combined method on a unique manually collected and annotated dataset of Aricle 8 case law on evictions. The results of our experiments show that our combined (text and citation-based) approach provides the best results in finding and grouping case law, providing scholars with an effective way to extract and analyse relevant cases on a specific issue.

Abstract

Tremor in Parkinson's disease is most frequently studied in the limbs, even though it also occurs in the vocal tract. In the current study, we assessed the presence of tongue, lip and jaw tremor in 34 individuals with Parkinson's disease (IwPD) and 25 controls (CS). We used electromagnetic articulography sensors attached to the tongue, the lips, and the jaw to measure orolingual tremor while the participants were performing a series of tasks. Additionally, we acoustically measured frequency and amplitude tremor of the voice in a sustained phonation task. Our findings revealed that IwPD showed significantly more tongue, lip, and jaw tremor than CS. Kinematic tremor frequency and RMS amplitude did not differ between IwPD and CS. We found no group difference in voice tremor prevalence or frequency in our acoustic analysis. While intensity and power indices seemed stronger in IwPD compared to CS, these differences were not significant. We show that electromagnetic articulography is suited for identifying orolingual tremor. While kinematic tremor was more prevalent in IwPD, it also appeared in CS, underlining the importance of including control participants in this type of study.

Abstract

Case law plays a critical role in shaping our understanding of human rights, including the right to adequate housing. However, analyzing large legal databases like HUDOC, which contains over 40,000 cases, is a challenging task that requires automated solutions. This study focuses on detecting cases related to housing - a topic encompassing issues such as eviction, access to adequate housing and etc. - from the HUDOC database. For this, we developed classifiers to identify cases related to both housing and eviction issues. We first constructed a dataset using an unsupervised process refined through manual corrections. Then, we trained the Adaptive Chordal Distance-based Subspace Learning Vector Quantization models. These models achieved classification accuracies of 93% for housing-related cases and 91.5% for eviction-specific cases, matching the performance of transformer-based models while requiring fewer computational resources. Furthermore, they provide interpretability by assigning word-level importance scores, helping legal scholars understand and verify the reasoning behind the model's predictions. The models identified 2,305 potentially housing-related cases. Manual reviews confirmed that 278 of 340 reviewed cases were indeed relevant. By detecting overlooked cases and enriching legal datasets, this study highlights the utility of NLP methods in facilitating the analysis of human rights case law. This approach supports a deeper exploration of housing rights and eviction-related decisions under the European Court of Human Rights (ECtHR), offering transparency, efficiency, and scalability for legal research.

Abstract

A major mechanism of language maintenance is transmission from parents to their children. This mechanism is more stable for the regional language Frisian than for Low Saxon in the northern Netherlands. In this study, we assessed the association strength with parental language transmission for a wide range of variables (e.g., language use, attitudes, and geography) for both languages. We analyzed questionnaire responses from around 25,000 Frisian and Low Saxon speakers participating in the Lifelines cohort study. Transmission was strongly associated with whether their children's other parent speaks the same language and the frequency of language use in different social contexts. Further relevant variables include geographical patterns, language attitudes, writing fluency, and conservative language use. These findings suggest that language maintenance for Frisian and Low Saxon could potentially be supported by language policies that adequately stimulate positive language attitudes, use of the language in different social contexts, and improving writing fluency.

Abstract

Purpose: The purpose of this study was to quantify sentence-level articulatory kinematics in individuals treated for oral squamous cell carcinoma (ITOC) compared to control speakers while also assessing the effect of treatment site (jaw vs. tongue). Furthermore, this study aimed to assess the relation between articulatory–kinematic measures and self-reported speech problems.
 
Method: Articulatory–kinematic data from the tongue tip, tongue back, and jaw were collected using electromagnetic articulography in nine Dutch ITOC and eight control speakers. To quantify articulatory kinematics, the two-dimensional articulatory working space (AWS; in mm²), one-dimensional anteroposterior range of motion (AP-ROM; in mm), and superior–inferior range of motion (SI-ROM in mm) were calculated and examined. Self-reported speech problems were assessed with the Speech Handicap Index (SHI).
 
Results: Compared to a sex-matched control group, ITOC showed significantly smaller AWS, AP-ROM, and SI-ROM for both the tongue tip and tongue back sensor, but no significant differences were observed for the jaw sensor. This pattern was found for both individuals treated for tongue and jaw tumors. Moderate nonsignificant correlations were found between the SHI and the AWS of the tongue back and jaw sensors.
 
Conclusions: Despite large individual variation, ITOC showed reduced one- and two-dimensional tongue, but not jaw, movements compared to control speakers and treatment for tongue and jaw tumors resulted in smaller tongue movements. A larger sample size is needed to establish a more generalizable connection between the AWS and the SHI. Further research should explore how these kinematic changes in ITOC are related to acoustic and perceptual measures of speech.

Abstract

Background and aim: Treatment for oral or oropharyngeal squamous cell carcinoma (O&OSCC) often leads to problems with speech articulation. Articulatory-kinematic data may be especially informative in designing new therapeutic approaches for individuals treated for these tumours. The purpose of this study was to provide a systematic review of the literature assessing the articulatory-kinematic consequences of oral and oropharyngeal cancer treatment.
 
Methods: Five databases (PubMed, Embase, Scopus, Web of Science, and PsycInfo) were used to identify studies that used kinematic methods to characterise the speech of individuals treated for O&OSCC. Risk of bias was assessed using the critical appraisal checklist from the Joanna Briggs Institute. Data was synthesised using the Synthesis Without Meta-Analysis guidelines.
 
Results: In total, 29 studies with a total of 197 individuals treated for O&OSCC were included. In most studies the risk of bias was moderate to high and certainty of evidence was very low to low. Results showed both global changes (i.e., reduced movement and increased asymmetry of the tongue) as well as more local changes (i.e., reduced palatal contact and more centralised productions of consonants) following treatment for O&OSCC. Generally, reported changes were related to tumour size and location. Smaller tumours resulted in better or more typical articulatory-kinematic speech outcomes as compared to larger tumours. Articulatory movements were most reduced in the affected region of the tongue as compared to neighbouring parts. Study findings were limited to small sample sizes with generally minimal descriptions of patient characteristics. No study assessed the influence of primary radiation treatment or adjuvant radiation therapy on kinematic speech outcomes.
 
Conclusion: Based on the literature to-date, surgical treatment for O&OSCC seems to reduce articulatory-kinematics of speech, and post-treatment outcomes may be partially explained by tumour size and location. The absence of studies assessing the effect of primary or adjuvant radiation therapy on articulatory-kinematics limits our knowledge of how these interventions influence post-treatment kinematic speech outcomes. Future studies should provide detailed patient descriptions and develop standardised speech assessment tools in order to further our knowledge regarding articulatory-kinematic speech changes following treatment, and to move towards the development of active rehabilitation strategies for those with O&OSCC.

Abstract

Language questionnaires are often used to approximate the size of linguistic communities, which we attempt for two regional languages in the Netherlands: Frisian and Low Saxon. We distributed a language questionnaire about a range of topics (including language use, proficiency, intergenerational transfer, and the respondent’s language learning context) through an existing large-scale longitudinal study (the Lifelines Cohort Study). This yielded 38,500 respondents across the three northern provinces (Fryslân, Groningen, and Drenthe) where the two regional languages are spoken. Language questionnaires can suffer from bias arising from how questions are presented or information is portrayed. Our sample likely suffered from sampling bias, because the prevalence of dialect speakers was unrealistically large. Initially, we applied post-stratification to account for differences between ratios in the sample and the northern population (e.g., for sex, age, domicile population density, and educational attainment). This only improved the estimates to a limited extent for our metrics (i.e., self-indicated speaking proficiency and use at home), so we used an intergenerational transmission approach instead. Earlier language usage estimates were used as reference points, and we derived estimates for the generations that followed the reference generations. We found that the Low Saxon speaker population size is declining, with around 350,000 speakers in 2021 aged between 6 and 69 (around 41% of the population in that age range) and 140,000 people using it at home (around 17%). The Frisian population appears stable, with around 250,000 speakers aged between 5 and 60 (62% of the population in that age range) and 195,000 people using it at home (around 48%). As these estimates seem plausible when compared to other speaker counts, we conclude that our intergenerational estimation approach may be used to obtain speaker estimates when required information is available and more common methods are ineffective.

Abstract

Belonging to groups is often based on shared features between members and is associated with higher levels of (social) well-being. One especially strong marker of one's group membership is language. In linguistics, most research about group membership and well-being focuses on migrants and refugees. However, very little research has focused on the link between speaking a regional language and well-being. This is surprising, as regional languages index a strong shared in-group identity that could lead to exclusion of those who do not speak them. As a first empirical step, this paper reports on the association between regional language use (specifically, of Frisian and Low Saxon) and social well-being. We distributed a language background questionnaire to participants of the Lifelines cohort, a multigenerational cohort study comprising data from 167,729 participants living in the north of the Netherlands. In both language contexts (Frisian in Fryslân, and Low Saxon in Groningen and Drenthe), those using the regional language half of the time or more were found to have significantly more social contacts. They also experienced higher levels of social embeddedness than those who did not know or did not frequently use the regional language. The higher degree of social embeddedness for frequent regional language users was most strongly present in rural areas. Furthermore, we found that frequent users of Frisian living in Fryslân had higher levels of social embeddedness in rural areas than frequent users of Low Saxon living in Groningen or Drenthe. No effect was found for more overt measures of social well-being such as loneliness or life satisfaction. While our results confirm an association between regional language speaking and some indices of social functioning on a large scale, they cannot uncover a causal relationship between the two. We discuss how longitudinal studies and interviews in future studies may inform us further about the relation between regional language use and social well-being.

Abstract

ERPs (Event-Related Potentials) have become a widely-used measure to study second language (L2) processing. To study individual differences, traditionally a component outcome measure is calculated by averaging the amplitude of a participant's brain response in a pre-specified time window of the ERP waveform in different conditions (e.g., the 'Response Magnitude Index'; Tanner, Mclaughlin, Herschensohn & Osterhout, 2013). This approach suffers from the problem that the definition of such time windows is rather arbitrary, and that the result is sensitive to outliers as well as participant variation in latency. The latter is particularly problematic for studies on L2 processing. Furthermore, the size of the ERP response (i.e., amplitude difference) of an L2 speaker may not be the best indicator of near-native proficiency, as native speakers also show a great deal of variability in this respect, with the 'robustness' of an L2 speaker's ERP response (i.e., how consistently they show an amplitude difference) potentially being a more useful indicator. In this paper we introduce a novel method for the extraction of a set of individual difference measures from ERP waveforms. Our method is based on participants' complete waveforms for a given time series, modelled using generalized additive modelling (GAM; Wood, 2017). From our modelled waveform, we extract a set of measures which are based on amplitude, area and peak effects. We illustrate the benefits of our method compared to the traditional Response Magnitude Index with data on the processing of grammatical gender violations in 66 Slavic L2 speakers of German and 29 German native speakers. One of our measures in particular appears to outperform the others in characterizing differences between native speakers and L2 speakers, and captures proficiency differences between L2 speakers: the 'Normalized Modelled Peak'. This measure reflects the height of the (modelled) peak, normalized against the uncertainty of the modelled signal, here in the P600 search window. This measure may be seen as a measure of peak robustness, that is, how reliable the individual is able to show a P600 effect, largely independently of where in the P600 window this occurs. We discuss implications of our results and offer suggestions for future studies on L2 processing. The code to implement these analyses is available for other researchers.

Abstract

Large phonetic corpora are frequently used to investigate language variation and change in dialects, but these corpora are often constructed by many researchers in a collaborative effort. This typically results in inter-transcriber issues that may impact the reliability of analyses using these data. This problem is exacerbated when multiple phonetic corpora are compared when investigating real time dialect change. In this study, we therefore propose a method to automatically and iteratively merge phonetic symbols used in the transcriptions to obtain a more course-grained, but better comparable, phonetic transcription. Our approach is evaluated using two large phonetic Netherlandic dialect corpora in an attempt to estimate sound change in the area in the 20th century. The results are discussed in the context of the available literature about dialect change in the Netherlandic area.

Abstract

With the ever-growing accessibility of case law online, it has become challenging to manually identify case law relevant to one's legal issue. In the Netherlands, the planned increase in the online publication of case law is expected to exacerbate this challenge. In this paper, we tried to predict whether court decisions are cited by other courts or not after being published, thus in a way distinguishing between more and less authoritative cases. This type of system may be used to process the large amounts of available data by filtering out large quantities of non-authoritative decisions, thus helping legal practitioners and scholars to find relevant decisions more easily, and drastically reducing the time spent on preparation and analysis. For the Dutch Supreme Court, the match between our prediction and the actual data was relatively strong (with a Matthews Correlation Coefficient of 0.60). Our results were less successful for the Council of State and the district courts (MCC scores of 0.26 and 0.17, relatively). We also attempted to identify the most informative characteristics of a decision. We found that a completely explainable model, consisting only of handcrafted metadata features, performs almost as well as a less well-explainable system based on all text of the decision.

Abstract

This article reports investigations into sound change at the community-level of Frisian and Low Saxon dialect groups in the north of the Netherlands, which differ in key factors influencing dialect decline. We combine phoneti- cally transcribed corpora with dialectometric approaches that can quantify change among older male dialect speakers in a real-time framework. A multidimensional variant of the Levenshtein distance, combined with methods that induce realistic distances between sounds, is used to estimate how much dialect groups converged to and diverged from Standard Dutch between 1990 and 2010. Our analyses indicate that sound change is a slow process in this geographical area. The Frisian and North Low Saxon dialect groups seem to be most stable, while Westphalian Low Saxon varieties seem to be most prone to change. We offer possible explanations for our findings and discuss shortcomings of the data and approach in detail.

Abstract

Background: The pandemic of the coronavirus disease 2019 (COVID-19) has led to an increased burden on mental health. Aims: To investigate the development of major depressive disorder (MDD), generalized anxiety disorder (GAD), and suicidal ideation in the Netherlands during the first fifteen months of the pandemic and three nation-wide lockdowns.
 
Method: Participants of the Lifelines Cohort Study - a Dutch population-based sample-reported current symptoms of MDD and GAD, including suicidal ideation, according to DSM-IV criteria. Between March 2020 and June 2021, 36,106 participants (aged 18-96) filled out a total of 629,811 questionnaires across 23 time points. Trajectories over time were estimated using generalized additive models and analyzed in relation to age, sex, and lifetime history of MDD/GAD.
 
Results: We found non-linear trajectories for MDD and GAD with a higher number of symptoms and prevalence rates during periods of lockdown. The point prevalence of MDD and GAD peaked during the third hard lockdown at 2.88 % (95 % CI: 2.71 %-3.06 %) and 2.92 % (95 % CI: 2.76 %-3.08 %), respectively, in March 2021. Women, younger adults, and participants with a history of MDD/GAD reported significantly more symptoms. For suicidal ideation, we found a significant linear increase over time in younger participants. For example, 20-year-old participants reported 4.14x more suicidal ideation at the end of June 2021 compared to the start of the pandemic (4.64 % (CI: 3.09 %-6.96 %) versus 1.12 % (CI: 0.76 %-1.66 %)).
 
Limitations: Our findings should be interpreted in relation to the societal context of the Netherlands and the public health response of the Dutch government during the pandemic, which may be different in other regions in the world.
 
Conclusions: Our study showed greater prevalence of MDD and GAD during COVID-19 lockdowns and a continuing increase in suicidal thoughts among young adults suggesting that the pandemic and government enacted restrictions impacted mental health in the population. Our findings provide actionable insights on mental health in the population during the pandemic, which can guide policy makers and clinical care during future lockdowns and epi/pandemics.

Abstract

The present study examined the kinematics of maximal effort sprint running, mapping the relations among a person's maximal running speed, maximum running acceleration and the distance coverable in a certain amount of time by this person. Thirty-three participants were recruited to perform a simple sprint task. Both forward and backward running were considered. Participants' position, velocity and acceleration data were obtained using a Local Positioning Measurement system. Participants' speed-acceleration profiles turned out to be markedly non-linear. To account for these non-linear patterns, we propose a new macroscopic model on the kinematics of sprint running. Second, we examined whether target distance was of influence on the evolution of participants' running speeds over time. Overall, no such effect on running velocity was present, except for a 'finish-line effect'. Finally, we studied how variation in individuals' maximum running velocities and accelerations related to differences in their action boundaries. The findings are discussed in the context of affordance-based control in running to catch fly balls.

Abstract

Although communicative language teaching (CLT) was thought to have revolutionized classroom practice, there are "weak" and "strong" versions (Howatt, 1984). Most foreign language classrooms in the world still favor weak versions with structure-based (SB) views on language (Lightbown & Spada, 2013), and practice in the Netherlands is not much different (West & Verspoor, 2016). However, a small group of teachers in the Netherlands started teaching French as a second language with a strong CLT program in line with Dynamic Usage-Based (DUB) principles. Rather than focusing on rule learning and explicit grammar teaching to avoid errors, the DUB program takes the dynamics of second-language development into consideration and focuses on the three key elements of usage-based theory: frequency, salience and contingency. These translate into a great deal of exposure, repetition, learning the meaning of every single word through gestures, and presenting whole chunks of language, all without explicit grammar teaching. This study aims to compare the effects of the SB and DUB instructional programs after three years. We traced the second-language development of 229 junior high school students (aged 12 to 15) learning French in the Netherlands over three years. The participants took three oral tests over the course of three years (568 interviews) and wrote seven narratives on the same topic (1511 narratives). As expected, the DUB approach, which is in line with a strong CLT version, was more effective in achieving proficiency in both speaking and writing and equally effective in achieving accuracy.

Abstract

Variation in speech is often quantified by comparing phonetic transcriptions of the same utterance. However, manually transcribing speech is time-consuming and error prone. As an alternative, therefore, we investigate the extraction of acoustic embeddings from several self-supervised neural models. We use these representations to compute word-based pronunciation differences between non-native and native speakers of English, and between Norwegian dialect speakers. For comparison with several earlier studies, we evaluate how well these differences match human perception by comparing them with available human judgements of similarity. We show that speech representations extracted from a specific type of neural model (i.e.~Transformers) lead to a better match with human perception than two earlier approaches on the basis of phonetic transcriptions and MFCC-based acoustic features. We furthermore find that features from the neural models can generally best be extracted from one of the middle hidden layers than from the final layer. We also demonstrate that neural speech representations not only capture segmental differences, but also intonational and durational differences that cannot adequately be represented by a set of discrete symbols used in phonetic transcriptions.

Abstract

In this paper, we discuss previous research in automatic prediction of court decisions. We define the difference between outcome identification, outcome-based judgement categorisation and outcome forecasting, and review how various studies fall into these categories. We discuss how important it is to understand the legal data that one works with in order to determine which task can be performed. Finally, we reflect on the needs of the legal discipline regarding the analysis of court judgements.

Abstract

Second language (L2) learning has been promoted as a promising intervention to stave off age-related cognitive decline. While previous studies based on mean trends showed inconclusive results, this study is the first to investigate nonlinear cognitive trajectories across a 30-week training period. German-speaking older participants (aged 64-75 years) enrolled for a Spanish course, strategy game training (active control) or movie screenings (passive control). We assessed cognitive performance in working memory, alertness, divided attention and verbal fluency on a weekly basis. Trajectories were modelled using Generalized Additive Mixed Models to account for temporally limited transfer effects and intraindividual variation in cognitive performance. Our results provide no evidence of cognitive improvement differing between the Spanish and either of the control groups during any phase of the training period. We did, however, observe an effect of baseline cognition, such that individuals with low cognitive baselines increased their performance more in the L2 group than comparable individuals in the control groups. We discuss these findings against the backdrop of the cognitive training literature and Complex Dynamic Systems Theory.

Abstract

Purpose: This study compares two electromagnetic articulographs (EMA) manufactured by Northern Digital, Inc.: the NDI Wave System (2008) and the NDI Vox-EMA System (2020).

Method: Four experiments were completed: (a) comparison of statically positioned sensors; 4(b) tracking dynamic movements of sensors manipulated using a motor-driven LEGO apparatus; (c) tracking small and large movements of sensors mounted in a rigid bar manipulated by hand; and (d) tracking movements of sensors rotated on a circular disc. We assessed spatial variability for statically positioned sensors, variability in the transduced Euclidean distances (EDs) between sensor pairs, and missing data rates. For sensors tracking circular movements, we compared the fit between fitted ideal circles and actual trajectories.

Results: The average sensor pair tracking error (i.e., the standard deviation of the EDs) was 1.37 mm for the WAVE and 0.12 mm for the VOX during automated trials at the fastest speed, and 0.35 mm for the WAVE and 0.14mm for the VOX during the tracking of large manual movements. The average standard deviation of the fitted circle radii charted by manual circular disc movements was 0.72mm for the WAVE sensors and 0.14mm for the VOX sensors. There was no significant difference between the WAVE and the VOX in the number of missing frames.

Conclusions: In general, the VOX system significantly outperformed the WAVE on measures of both static precision and dynamic accuracy (automated and manual). For both systems, positional precision and spatial variability were influenced by the sensors' position relative to the field generator unit (FGU; worse when further away).

Abstract

Background: Most epidemiological studies show a decrease of internalizing disorders at older ages, but it is unclear how the prevalence exactly changes with age, and whether there are different patterns for internalizing symptoms and traits, and for men and women. This study investigates the impact of age and sex on the point prevalence across different mood and anxiety disorders, internalizing symptoms, and neuroticism.

Methods: We used cross-sectional data on 146,315 subjects, aged 18-80 years, from the Lifelines Cohort Study, a Dutch general population sample. Between 2012-2016, five current internalizing disorders - major depression, dysthymia, generalized anxiety disorder, social phobia and panic disorder - were assessed according to DSM-IV criteria. Depressive symptoms, anxiety symptoms, neuroticism, and negative affect were also measured. Generalized additive models were used to identify nonlinear patterns of internalizing disorders, symptoms and traits over lifetime, and to investigate sex differences.

Results: The point prevalence of internalizing disorders generally increased between the ages of 18-30 years, stabilized between 30-50, and decreased after age 50. The patterns of internalizing symptoms and traits were different. Negative affect and neuroticism gradually decreased after age 18. Women reported more internalizing disorders than men, but the relative difference remained stable across age (relative risk ~1.7).

Conclusions: The point prevalence of internalizing disorders was typically highest between age 30-50, but there were differences between the disorders, which could indicate differences in etiology. The relative gap between the sexes remained similar across age, suggesting that changes in sex hormones around the menopause do not significantly influence women's risk of internalizing disorders.

Abstract

Alcohol intoxication is known to affect many aspects of human behavior and cognition; one of such affected systems is articulation during speech production. Although much research has revealed that alcohol negatively impacts pronunciation in a first language (L1), there is only initial evidence suggesting a potential beneficial effect of inebriation on articulation in a non-native language (L2). The aim of this study was thus to compare the effect of alcohol consumption on pronunciation in an L1 and an L2. Participants who had ingested different amounts of alcohol provided speech samples in their L1 (Dutch) and L2 (English), and native speakers of each language subsequently rated the pronunciation of these samples on their intelligibility (for the L1) and accent nativelikeness (for the L2). These data were analyzed with generalized additive mixed modeling. Participants' blood alcohol concentration indeed negatively affected pronunciation in L1, but it produced no significant effect on the L2 accent ratings. The expected negative impact of alcohol on L1 articulation can be explained by reduction in fine motor control. We present two hypotheses to account for the absence of any effects of intoxication on L2 pronunciation: (i) there may be a reduction in L1 interference on L2 speech due to decreased motor control or (ii) alcohol may produce a differential effect on each of the two linguistic subsystems.

Abstract

We present an acoustic distance measure for comparing pronunciations, and apply the measure to assess foreign accent strength in American-English by comparing speech of non-native American-English speakers to a collection of native American-English speakers. An acoustic-only measure is valuable as it does not require the time-consuming and error-prone process of phonetically transcribing speech samples which is necessary for current edit distance-based approaches. We minimize speaker variability in the data set by employing speaker-based cepstral mean and variance normalization, and compute word-based acoustic distances using the dynamic time warping algorithm. Our results indicate a strong correlation of r = -0.71 (p < 0.0001) between the acoustic distances and human judgments of native-likeness provided by more than 1,100 native American-English raters. Therefore, the convenient acoustic measure performs only slightly lower than the state-of-the-art transcription-based performance of r = -0.77. We also report the results of several small experiments which show that the acoustic measure is not only sensitive to segmental differences, but also to intonational differences and durational differences. However, it is not immune to unwanted differences caused by using a different recording device.

Abstract

When courts started publishing judgements, big data analysis (i.e. largescale statistical analysis of case law and machine learning) within the legal domain became possible. By taking data from the European Court of Human Rights as an example, we investigate how Natural Language Processing tools can be used to analyse texts of the court proceedings in order to automatically predict (future) judicial decisions. With an average accuracy of 75% in predicting the violation of 9 articles of the European Convention on Human Rights our (relatively simple) approach highlights the potential of machine learning approaches in the legal domain. We show, however, that predicting decisions for future cases based on the cases from the past negatively impacts performance (average accuracy range from 58% to 68%). Furthermore, we demonstrate that we can achieve a relatively high classification performance (average accuracy of 65%) when predicting outcomes based only on the surnames of the judges that try the case.

Abstract

This study focuses on an essential precondition for reproducibility in computational linguistics: the willingness of authors to share relevant source code and data. Ten years after Ted Pedersen's influential ``Last Words'' contribution in Computational Linguistics, we investigate to what extent researchers in computational linguistics are willing and able to share their data and code. We surveyed all 395 full papers presented at the 2011 and 2016 ACL Annual Meetings, and identified if links to data and code were provided. If working links were not provided, authors were requested to provide this information. While data was often available, code was shared less often. When working links to code or data were not provided in the paper, authors provided the code in about one third of cases. For a selection of ten papers, we attempted to reproduce the results using the provided data and code. We were able to reproduce the results approximately for half of the papers. For only a single paper we obtained the exact same results. Our findings show that even though the situation appears to have improved comparing 2016 to 2011, empiricism in computational linguistics still largely remains a matter of faith (Pedersen, 2008). Nevertheless, we are somewhat optimistic about the future. Ensuring reproducibility is not only important for the field as a whole, but also for individual researchers: below we show that the median citation count for studies with working links to the source code are higher.

Abstract

We conduct the first experiment in the literature in which a novel is translated automatically and then post-edited by professional literary translators. Our case study is Warbreaker, a popular fantasy novel originally written in English, which we translate into Catalan. We translated one chapter of the novel (over 3,700 words, 330 sentences) with two data-driven approaches to Machine Translation (MT): phrase-based statistical MT (PBMT) and neural MT (NMT). Both systems are tailored to novels; they are trained on over 100 million words of fiction. In the post-editing experiment, six professional translators with previous experience in literary translation translate subsets of this chapter under three alternating conditions: from scratch (the norm in the novel translation industry), post-editing PBMT, and post-editing NMT. We record all the keystrokes, the time taken to translate each sentence, as well as the number of pauses and their duration. Based on these measurements, and using mixed-effects models, we study post-editing effort across its three commonly studied dimensions: temporal, technical and cognitive. We observe that both MT approaches result in increases in translation productivity: PBMT by 18%, and NMT by 36%. Post-editing also leads to reductions in the number of keystrokes: by 9% with PBMT, and by 23% with NMT. Finally, regarding cognitive effort, post-editing results in fewer (29% and 42% less with PBMT and NMT respectively) but longer pauses (14% and 25%).