<div> <div> <div> <p>Researchers studying persuasion have mostly focused on modeling arguments to understand how people’s beliefs can change. However, in order to convince an audience the speakers usually adapt their speech. This can be seen often in political campaigns when ideas are phrased - framed - in different ways according to the geo-graphical region the candidate is in. This practice suggests that, in order to change people’s beliefs, it is important to take into account their previous perspectives and topics of interest. </p><p><br></p> <p>In this work we propose ChangeMyStance, a novel task to predict if a user would change their mind after being exposed to opposing views on a particular subject. This setting takes into account users’ beliefs before a debate, thus modeling their preconceived notions about the topic. Moreover, we explore a new approach to solve the problem, where the task is decomposed into ”simpler” problems. Breaking the main objective into several tasks allows to build expert modules that combined produce better results. This strategy significantly outperforms a BERT end-to-end model over the same inputs. </p> </div> </div> </div>

This paper looks at the relationship between emotion and vowel length in spontaneous speech, specifically during narratives. It is hypothesized that during emotionally-laden speech, vowel length will be longer in duration than when in non-emotional speech. Data is drawn from the Univerisity of California, Santa Barbara linguistic corpus, with conversations focused on individuals in and around Southern California. The paper builds on work by Dabbs et al., Banse & Scherer, Estes & Adelman, and others regarding the nature of cognitive monitoring, as well as stance as discussed by Ochs & Schieffelin, Ochs, Kärkkainen, Local & Walker, and how emotion is displayed in speech. Tokens chosen for analysis are /ɑ/, /ɑɪ/, and /ə/. Three of each token in first syllable position is collected for analysis from both emotional and non-emotional speech. Analysis of tokens then takes place by (mean) averaging each token's length for each speaker in each stance, then the total vowel average time is calculated again for each speaker in each stance. Beyond intra-vowel, intra-speaker averages, inter-speaker average is calculated to assess consistency of the vowel length changes between stances. The paper finds that the length of tokens shows an average increase during intraspeaker emotional speech.

This thesis examines writing conference interactions between multilingual students and first-year composition instructors in order to understand the co-construction of instructor authority and student agency in discussions of academic writing. Multilingual approaches to first-year writing assert that inviting students’ home languages or dialects into the classroom allows multilingual students to use languages other than English connect with the curriculum, develop rhetorical complexity as writers, and to be validated as language users; however, scholarship could benefit from examining social interactions. Because identities, ideologies, and stances are co-constructed between people and emerge in social interactions,a discourse analysis of interactions between first-year composition instructors and multilingual students could identify ways that multilingual students and instructors position themselves, and how this positioning affects the validation of multilingualism, and hybrid identities. Data consists of 18 audio recordings of writing conferences between instructors and multilingual students, five interviews with first-year writing instructors, and audio-recorded post-conference interviews, where instructors and students were separately asked open-ended questions about the content of the writing conference. Employing a Communities of Practice lens in a discourse analysis of the data revealed that that expert-novice identities were co-constructed in interaction, and the emergence of this power differential that inhibited the validation of multilingualism, and hybridity. Implications for mitigating instructor authority and promoting student agency in interactions with multilingual students are discussed.

It has been noticed for a long time that humans can identify others based on their biological movement from a distance. However, it is only recently that computer vision based gait biometrics has received much attention. In this dissertation, we perform a thorough study of gait recognition from a computer vision perspective. We first present a parameterless baseline recognition algorithm, which bases similarity on spatio-temporal correlation that emphasizes gait dynamics as well as gait shapes. Our experiments are performed with three popular gait databases: the USF/NIST HumanID Gait Challenge outdoor database with 122 subjects, the UMD outdoor database with 55 subjects, and the CMU Mobo indoor database with 25 subjects. Despite its simplicity, the baseline algorithm shows strong recognition power. On the other hand, the outcome suggests that changes in surface and time have strong impact on recognition with significant drop in performance. To gain insight into the effects of image segmentation on recognition -- a possible cause for performance degradation, we propose a silhouette reconstruction method based on a Population Hidden Markov Model (pHMM), which models gait over one cycle, coupled with an Eigen-stance model utilizing the Principle Component Analysis (PCA) of the silhouette shapes. Both models are built from a set of manually created silhouettes of 71 subjects. Given a sequence of machine segmented silhouettes, each frame is matched into a stance by pHMM using the Viterbi algorithm, and then is projected into and reconstructed by the Eigen-stance model. We demonstrate that the system dramatically improves the silhouette quality. Nonetheless, it does little help for recognition, indicating that segmentation is not the key factor of the covariate impacts. To improve performance, we look into other aspects. Toward this end, we propose three recognition algorithms: (i) an averaged silhouette based algorithm that deemphasizes gait dynamics, which substantially reduces computation time but achieves similar recognition power with the baseline algorithm; (ii) an algorithm that normalizes gait dynamics using pHMM and then uses Euclidean distance between corresponding selected stances -- this improves recognition over surface and time; and (iii) an algorithm that also performs gait dynamics normalization using pHMM, but instead of Euclidean distances, we consider distances in shape space based on the Linear Discriminant Analysis (LDA) and consider measures that are invariant to morphological deformation of silhouettes. This algorithm statistically improves the recognition over all covariates. Compared with the best reported algorithm to date, it improves the top-rank identification rate (gallery size: 122 subjects) for comparison across hard covariates: briefcase, surface type and time, by 22%, 14%, and 12% respectively. In addition to better gait algorithms, we also study multi-biometrics combination to improve outdoor biometric performance, specifically, fusing with face data. We choose outdoor face recognition, a "known" hard problem in face biometrics, and test four combination schemes: score sum, Bayesian rule, confidence score sum, and rank sum. We find that the recognition power after combination is significantly stronger although individual biometrics are weak, suggesting another effective approach to improve biometric recognition. The fundamental contributions of this work include (i) establishing the "hard" problems for gait recognition involving comparison across time, surface, and briefcase carrying conditions, (ii) revealing that their impacts cannot be explained by silhouette segmentation, (iii) demonstrating that gait shape is more important than gait dynamics in recognition, and (iv) proposing a novel gait algorithm that outperforms other gait algorithms to date.

This thesis is concerned with explicating the role of language in mobilising action through management emails. Situated within the context of organisational change in a globalised manufacturing business, the project is framed by behavioural observations from management scholars Palmer and Hardy (2000) of mobilisation strategies that utilise linguistic resources since they: (a) involve a sense of obligation or inclination in directives; (b) show how co-operation will produce mutual benefits; (c) construct desired actions as legitimate, beneficial or inevitable; and (d) use past or anticipated meanings, for or against certain actions. Systemic Functional Linguistics is the underlying framework employed to provide a theoretically principled account of the intuitively derived observations from Palmer and Hardy (2000) which are applied to a sample of twenty-seven email texts, through corpus- and text-based analysis. A major finding is that the representation of action is enacted interpersonally through the verbal group. This view complements experientially dominated accounts of the verbal group which focus on the tense system. Further, action is found to be motivated through the negotiation of evaluative stance. By relating the grammar of the verbal group as well as other resources to the discourse semantics of Appraisal, modulation (of obligation or inclination) is found to be enabled by both negative as well as positive judgements of capacity. Specifically, judgements of capacity are re-interpreted as invocations of high obligation as managers seek to mobilise (further) positive performance. The analysis demonstrates that elements in the verbal group (complex) and Appraisal co-opt action through enabling positioning of the writer, in terms of assessing and grading categorical meanings, manipulating interpersonal time, or foregrounding solidarity. A significant contribution to the thesis is an extension of the system of GRADUATION: FOCUS (Hood, 2004a) through the demonstration of how resources of the verbal group negotiate expectations of appearances and achievements. This study has also extended the resources of GRADUATION: FORCE by applying it to the management context. The practical contribution of the study is that these insights may more explicitly inform management training and enable managers to participate more effectively within their community of practice.

The present thesis explores talk in institutional settings, with a particular focus on how institutionality and institutional norms are constructed and reproduced in interaction. A central aim is to enhance our understanding of how institutional agendas are talked into being. In line with the ethno­methodological approach, norms are viewed as accomplished in everyday interaction, whereas institutionality represents dimensions of talk where participants demonstrably orient to particular contextual constraints. Five studies were conducted using Conversation Analysis (CA), focusing on how institutional constraints impact sequential trajectories and shape different opportunities for participants. The data consists of two corpora of video recordings: group tutorials at a Swedish university (UTs), and performance appraisal interviews in an organ­ization (PAIs). The thesis pays particular attention to the interactional management of knowledge, entitlement and stance, and analytic foci include how speakers manage epistemic claims and rights at a certain point in interaction, and how they accomplish social positioning. The UT studies examine the negotiation of rights to speak for others in a group (Study I), and how diver­ging understandings of the institutional activity-at-hand can be negotiated on the basis of students’ advice-seeking questions (Study II). In Study III, orientations to institutional and sociocultural norms are investigated in the PAIs, where managers and employees treat negative stances on stress as problematic. The relationship between theory and institutional practice in the use of question templates in PAIs is also examined, through an analysis of the delivery and receipt of a particular question in different interviews (Study IV). Focusing on different adaptations of a preset item, this analysis shows how the same question sets up for a variety of subsequent actions. Finally, deployment of the verb känna (‘feel’) in managing epistemic access and primacy is examined (Study V). It is argued that ‘feel’ allows for a reduction of accountability when making epistemic claims. The studies highlight the relationship between linguistic formats and social actions and illustrate how institutional agendas have consequences for participant conduct. Attention to the details of actions in institutional interaction can thus shed light on social and linguistic underpinnings of the enactment of institutional norms.

Disertacijoje tiriamas autoriaus pozicijos švelninimas (angl. hedging) humanitarinių mokslų srities (kalbotyros krypties) ir biomedicinos mokslų srities (medicinos krypties) moksliniuose straipsniuose anglų ir lietuvių kalbomis. Disertacijos tikslas – nustatyti sąšvelnių (angl. hedges) vartosenos tendencijas ir raiškos ypatumus kalbotyros ir medicinos straipsniuose lietuvių ir anglų kalbomis bei išsiaiškinti, kokie veiksniai lemia autoriaus pozicijos raišką tyrinėtuose moksliniuose straipsniuose: konkreti mokslo sritis ar labiau kalbos, kultūros ypatumai. Dėl didelės kalbinių vienetų, galinčių atlikti sąšvelnių funkciją, įvairovės šiame darbe apsiribota tik tam tikromis raiškos priemonėmis: modaliniais veiksmažodžiais, leksiniais veiksmažodžiais ir prieveiksmiais bei aplinkybiniais žodžiais, tirtais iš episteminio modalumo, evidencialumo ir neapibrėžtumo kategorijų perspektyvos. Išanalizavus medžiagą, prieita prie tokių išvadų: sąšvelnių vartosenos įvairovė priklauso nuo disciplinos, o dažniausiai pasirenkamos leksinių vienetų grupės – nuo konkrečios kalbos (anglų vs. lietuvių). Sąšvelnių vartosenos dažnį lemia tiek kalba, tiek disciplina. Tarpdalykinio tyrimo rezultatų palyginimas rodo, kad ir lietuviai, ir anglakalbiai medikai vartoja mažiau tirtų kategorijų sąšvelnių nei kalbininkai. Skiriasi ir vartotų sąšvelnių įvairovė: tirtuose kalbotyros straipsniuose abiejomis kalbomis nustatyta įvairesnių sąšvelnių nei medicinos straipsniuose. Tarpkalbinio tyrimo rezultatai parodė... [toliau žr. visą tekstą] / The object of this dissertation is hedging in Lithuanian and English research articles in the field of humanities and biomedical sciences. The aim of the research is to identify hedging devices and functions in linguistic and medical research articles in Lithuanian and English and to explore to what extent hedging is language-specific and discipline-specific. As there is a great variety of linguistic resources which convey the pragmatic function of hedging, this research is limited to certain lexical hedges: modal verbs, lexical verbs and adverbials, which are analysed within the conceptual categories of epistemic modality, evidentiality and vagueness. The results of the research suggest that the variety of hedging devices is determined by the discipline, whereas the type of the most frequent lexical hedges depends on the language (English vs. Lithuanian). The frequency of hedges used in the analyzed research articles depends both on the language and discipline. The results of the cross-disciplinary research show that both Lithuanian and English authors of medical texts tend to use fewer hedges than linguists. The variety of hedges employed in the analyzed articles of both disciplines is also different. In both Lithuanian and English linguistic articles a greater variety of hedges has been observed. The results of the cross-linguistic research indicate that according to the main parameters of the analysis, the English authors of the analyzed research articles employ hedges... [to full text]

The Ottawalk-Speed (OWS) orthosis prevents knee collapse in stumble situations. The purpose of this study was to develop a virtual stumble perturbation to measure OWS response to a knee collapse when walking. A new split speed perturbation was developed for the CAREN virtual reality system. This perturbation induced a stumble with increased knee flexion for five able-bodied participants, with either a hopping or stopping recovery strategy. Three knee-ankle-foot orthosis users were subjected to five stumble trials while wearing the OWS. OWS participants used a straight-legged recovery strategy, and extended the knee through recovery weight acceptance. Therefore, the split speed perturbation was not appropriate to measure OWS response to a stumble since knee collapse did not occur. The OWS allowed free knee motion during gait. Further study is required to measure OWS response during a stumble with a knee collapse event.

This thesis is concerned with explicating the role of language in mobilising action through management emails. Situated within the context of organisational change in a globalised manufacturing business, the project is framed by behavioural observations from management scholars Palmer and Hardy (2000) of mobilisation strategies that utilise linguistic resources since they: (a) involve a sense of obligation or inclination in directives; (b) show how co-operation will produce mutual benefits; (c) construct desired actions as legitimate, beneficial or inevitable; and (d) use past or anticipated meanings, for or against certain actions. Systemic Functional Linguistics is the underlying framework employed to provide a theoretically principled account of the intuitively derived observations from Palmer and Hardy (2000) which are applied to a sample of twenty-seven email texts, through corpus- and text-based analysis. A major finding is that the representation of action is enacted interpersonally through the verbal group. This view complements experientially dominated accounts of the verbal group which focus on the tense system. Further, action is found to be motivated through the negotiation of evaluative stance. By relating the grammar of the verbal group as well as other resources to the discourse semantics of Appraisal, modulation (of obligation or inclination) is found to be enabled by both negative as well as positive judgements of capacity. Specifically, judgements of capacity are re-interpreted as invocations of high obligation as managers seek to mobilise (further) positive performance. The analysis demonstrates that elements in the verbal group (complex) and Appraisal co-opt action through enabling positioning of the writer, in terms of assessing and grading categorical meanings, manipulating interpersonal time, or foregrounding solidarity. A significant contribution to the thesis is an extension of the system of GRADUATION: FOCUS (Hood, 2004a) through the demonstration of how resources of the verbal group negotiate expectations of appearances and achievements. This study has also extended the resources of GRADUATION: FORCE by applying it to the management context. The practical contribution of the study is that these insights may more explicitly inform management training and enable managers to participate more effectively within their community of practice.

This study explores the similar and different developmental influences that shape the practice of beginning and advanced spiritual directors. An examination of the contemporary literature on spiritual direction finds that in the main, two developmental influences shape the practice of contemporary spiritual directors: their capacity to adopt a contemplative stance towards their directees and their ability to be aware contextually of the factors that fashion the dynamic of accompaniment. While the review highlights the presence of these two influences, the literature is deficient in understanding the similarities and differences in how these two influences shape the practice of beginning and advanced spiritual directors. To address the deficiency, this study reviews three groups of Western Australian spiritual directors, Anglican, Churches of Christ and Roman Catholic. The investigation takes a qualitative, ethnographic approach, using focus groups. An analysis and discussion of the data confirms that the similarities and differences in the influences that shape their practice revolve around two key developmental influences namely, the capacity of directors to adopt a contemplative stance to their directees, and their ability to be aware contextually of the factors that fashion the dynamic of accompaniment. While both influences shape beginning and advanced directors, the former impacts more on the practice of beginning directors and the latter more affects advanced directors. Two factors may initiate and sustain the capacity of directors to adopt a contemplative stance. First, directors grow by noticing and attending to all the dimensions of their human experience. Second, directors develop by having their experience attended to in some form of therapeutic relationship or through participation in various developmental group processes. Directors may enhance their capacity to be aware contextually of the factors that fashion the dynamic of accompaniment through understanding paradigms about spiritual direction practice and spiritual development. Their appreciation of paradigms about spiritual direction may derive from two sources. The first is by how they distinguish more effectively spiritual direction from other therapeutic practices. The second is by how they grow in understanding relevant theological, philosophical, and psychological perspectives that inform good practice. Directors may further increase their comprehension of interpretive frameworks about spiritual development by redressing the attitudinal effects of fundamentalism and incorporating a multiplicity of approaches to spirituality. Training programmes are an important means to introduce and develop directors’ abilities to be aware contextually of the factors that fashion the dynamic of accompaniment. A person’s ecclesial role may influence the context in which a director commences practice. From this discussion, this study draws conclusions and offers recommendations applicable to practice and research.