In this thesis four empirical studies dealt with children with profound multiple disabilities and their parents with regard to: (a) how parents perceived interaction with their children (b) how observed child/parent interaction was linked to behavior style of the children as perceived by the parents (c) how parents of children with profound multiple disabilities perceived child/parent interaction and behavior style of their children in comparison to parents to children without disabilities matched for communicative ability and age respectively, and, (d) how social networks and family accommodations were linked to child/parent interaction and child behavior style over time for these families according to parental appraisals. The results in study I showed that child/parent interaction occurred through out the day and constituted of mutual experience and joy. There were two processes in interaction: monitoring interaction and successful interaction. Study II found hypo- and hyper dominated behaviour style of the children to influence interaction differently. The parents were found to be experts on their children in monitoring interaction to achieve more frequent periods of successful interaction. Study III found few differences in wishes about ideal interaction between parents of children with profound multiple disabilities and parents of typically developing children. Study IV showed that the children were communicative dependent on their parents; there were few complete overlaps between the children’s and the family’s social networks; and although family accommodations were child-driven, sustainability of family life evolved around other factors. There was a “contradiction” in results for the whole thesis: child/parent interaction occurred through out ordinary everyday life and constituted of mutual experience and joy versus the children’s communicative dependency and the distance found between social networks of families and children and child/parent interaction.

The purpose of this study was to examine the effects of a controversial test administration alteration, the read-aloud alteration, in which text (passages and questions) is read aloud to the student on a reading comprehension test. For students whose disabilities impair their skill in decoding text and reading fluently, accessing text to demonstrate their comprehension can be significantly impeded. Using a quasi-experimental design, this study examined whether the comprehension scores for students with disabilities with certain characteristics improved with the read-aloud alteration. Participants were fourth-grade Georgia public school students (N=664) enrolled during the 2005-2006 school year, with and without disabilities, who were administered the third-grade Reading Criterion-Referenced Competency Test under either the read-aloud or standard administration condition. A 20-question survey was completed for each special education student who participated by the educator most familiar with the student’s educational program. Several moderator variables, such as reading achievement as measured by an external criterion (the reading comprehension subtest of the Iowa Test of Basic Skills), the degree of the student’s disability, as rated by the teacher, and individualized educational program features such as the presence of a decoding objective and time spent in the general education classroom, were investigated. These moderator variables were hypothesized to help better identify students with disabilities who might need and benefit from the read-aloud alteration. Students given the read-aloud alteration achieved higher raw score gains on the posttest than those assessed under the standard condition regardless of their disability status (students with or without disabilities). No interactions were identified between the moderator variables studied and test condition, with the exception of testing condition (standard / read loud) and reading skill (below average, average, or above average). Regardless of disability status, students who were provided the read-aloud alteration and were classified as having below average reading skills on the norm-reference ITBS had higher gain scores than their peers.

Deliberative democrats have argued that democracy requires citizens to seek consensus, using a familiar style of principle-based moral argument. However, critics like Iris Young object that deliberative democracy’s favoured model of reasoning is inadequate for resolving deep value conflicts. She and others have suggested that the aim of improving understanding across political differences could be achieved if our conception of legitimate democratic discourse were broadened to include a significant role for narrative. The question is whether such a revision would amount to abandoning the deliberative democratic goal of seeking reasonable resolutions of value conflict. This thesis argues that a narrative approach to deliberative democracy can realize its commitment to reasoned justification, while preserving the significance of differing perspectives and promoting mutual understanding. The narrative-contextualist approach is developed and illustrated with reference to public debate over issues such as cultural accommodation and historical justice.

Phonetic accommodation is the process whereby speakers in an interaction modify their speech in response to their interlocutor. The social-psychological theory of Communication Accommodation Theory (Giles 1973) predicts that speakers will converge towards (become more similar to) their interlocutors in order to decrease social distance, whereas they will diverge from (become less similar to) their interlocutors to accentuate distinctiveness or show disdain. Previous studies have found that phonetic accommodation is affected by many social, situational and linguistic factors (Abrego-Collier et al. 2011; Black 2012; Babel 2009, 2010, 2012; Babel et al. 2012; Kim, Horton & Bradlow 2011; Nielsen 2011; Pardo et al. 2012). With respect to accommodation across dialects, a handful of studies have suggested that the perceptual salience of the various differences between two dialects might affect the pattern; however, these studies make conflicting predictions. Trudgill (1986) predicts that speakers will converge more towards the more salient dialectal differences, while Kim et al. (2011) and Babel (2009, 2010) suggest the opposite: that speakers will converge on the less salient differences. This thesis investigates how the perceptual salience of 6 differences between Buenos Aires Spanish and Madrid Spanish affect the pattern of phonetic accommodation in conversation. The results are considered both in terms of the magnitude of the changes that the participants make as well as the direction of the change (convergence or divergence). The results show that perceptual salience has a significant effect on the magnitude of the change, with all participants making greater changes as perceptual salience increases. On the other hand, perceptual salience was found not to have a consistent effect for all speakers on the likelihood of converging or diverging on the dialectal differences. I argue that the lack of consistent effect of salience on the direction of the change stems from individual differences in motivation to take on the opposing dialect norms and issues of personal identity, whereas the very consistent effect of salience on the magnitude of the change suggests that there is something more basic or systematic about how salience interacts with the extent to which speakers accommodate.

Policy guidelines of the Education Quality and Accountability Office (EQAO) state that accommodations and participation decisions on the Ontario Secondary School Literacy Test (OSSLT) do not threaten validity. However, these issues are contentious in American large-scale testing. New approaches integrate test access, administration, accommodation and participation within a unified fairness and validity construct. The current study, based on demographic and outcome data for the entire population of OSSLT-eligible students from 2006 to 2009, demonstrates changing patterns in accommodations and participation decisions across schools and years. In particular, English language learners are found to be considerably underrepresented among students receiving special needs accommodations. This has implications for the valid interpretation and fair use of test scores. Recommendations are proposed for improving fairness, consistency, and validity in administering accommodations and participation.

Policy guidelines of the Education Quality and Accountability Office (EQAO) state that accommodations and participation decisions on the Ontario Secondary School Literacy Test (OSSLT) do not threaten validity. However, these issues are contentious in American large-scale testing. New approaches integrate test access, administration, accommodation and participation within a unified fairness and validity construct. The current study, based on demographic and outcome data for the entire population of OSSLT-eligible students from 2006 to 2009, demonstrates changing patterns in accommodations and participation decisions across schools and years. In particular, English language learners are found to be considerably underrepresented among students receiving special needs accommodations. This has implications for the valid interpretation and fair use of test scores. Recommendations are proposed for improving fairness, consistency, and validity in administering accommodations and participation.

Deliberative democrats have argued that democracy requires citizens to seek consensus, using a familiar style of principle-based moral argument. However, critics like Iris Young object that deliberative democracy’s favoured model of reasoning is inadequate for resolving deep value conflicts. She and others have suggested that the aim of improving understanding across political differences could be achieved if our conception of legitimate democratic discourse were broadened to include a significant role for narrative. The question is whether such a revision would amount to abandoning the deliberative democratic goal of seeking reasonable resolutions of value conflict. This thesis argues that a narrative approach to deliberative democracy can realize its commitment to reasoned justification, while preserving the significance of differing perspectives and promoting mutual understanding. The narrative-contextualist approach is developed and illustrated with reference to public debate over issues such as cultural accommodation and historical justice.

No description available.

A previous study in chickens revealed that myosin light chain kinase (MLCK), f actin, and myosin are found on the crystalline lens. Their polygonal arrangement at the posterior surface resembles a muscle tissue, which suggests that these proteins may have a contractile role in accommodation. The ciliary muscle in chickens is skeletal in nature and, therefore, chickens were used to test the hypothesis that contractile microfilaments play a role in accommodation. Ciliary nerve-induced accommodation was measured in the presence of an MLCK inhibitor 1-(5-Iodonaphthalene-1-sulfonyl)-1H-hexahydro-1,4-diazepine hydrochloride (ML-7). Eyes of 6-day old white Leghorn chickens (gallus gallus domesticus) were enucleated in Tyrode’s saline solution while keeping the ciliary nerve intact. One eye was treated with ML-7 and the other eye was treated with vehicle only. Three concentrations of ML-7 were used: 1 µM, 10 µM, and 100 µM. Two experiments were carried out, one including a (3×10 min) wash and one without. Focal lengths of the vehicle- and ML-7-treated eyes were measured before, during and after accommodation. Immunoblots were used to detect the amount of phosphorylated myosin with and without the inhibitor. Focal lengths for accommodation were shorter than those at rest (p<0.001). In the wash experiment, vehicle-treated eyes had higher accommodative amplitudes compared to ML-7-treated eyes for all three dosage groups. In the no-wash experiment, only the 1 µM group demonstrated the same trend as the wash experiment. For the 10 µM and 100 µM groups, ML-7-treated eyes had higher accommodative amplitudes compared to vehicle-treated eyes. Immunoblots revealed varying amounts of inhibition within pairs of eyes as well as between birds for both experiments. Results from this experiment indicate that ML-7 was not effective at determining whether contractile microfilaments found on the lens contribute to accommodation.

Les technologies de relief tridimensionnel (3D) ont récemment reçu un nouvel attrait. Lesraisons potentielles sont que ces technologies peuvent fournir une expérience visuelle plusriche et plus immersive. En effet, un observateur peut extraire les disparités binoculairesprésentées entre les vues gauche et droite, pour retrouver plus efficacement la profondeur dela scène visuelle observée, et ainsi, trouver une nouvelle dimension dans le contenu.Cependant, tandis que la valeur de la profondeur est plutôt bien appréciée, un certain nombrede problèmes qui impactent la qualité de l'expérience dans les représentations 3D ont étéidentifiés. L'objective de cette thèse est d'étudier les principaux facteurs qui affectent laqualité de l'expérience en stéréoscopie dans le but de fournir des méthodes qui pourraientaméliorer l'utilisation des systèmes stéréoscopiques. Trois aspects majeurs de la qualité del'expérience sont adressés : (1) les sources et causes de la fatigue visuelle, (2) les distorsionsperceptives et (3) l'amélioration de la qualité de l'expérience en 3D au travers de l'adaptationdu contenu visuel. Pour étudier la fatigue visuelle, les mouvements de vergence étaientmesurés à la fois avec un écran 3D et avec un système à double écran qui permettaient laprésentation de stimuli avec les informations de disparité et de flou présentés en congruencecomme en incongruence. L'effet de la stéréoscopie sur les mouvements de vergence a étéétudié dans le but de tester si la mesure oculaire pouvait être utilisée comme indicateur defatigue visuelle. Le sujet suivant étudiait la consistance de la perception des formes 3Dstéréoscopiques en fonction de distances virtuelles induites par la disparité et par le signald'accommodation. Le rôle de la taille de la pupille et de la profondeur de champ enstéréoscopie étaient étudiés par la manipulation de la taille de la pupille avec deux conditionsd'illumination contrôlée. Finalement, l'amélioration de la perception de la forme 3D estquestionnée au travers de l'adaptation du contenu visuel en fonction de la mesure de seuilsperceptifs individuels pour des stimuli se déplaçant en profondeur.