Dell (1986) presented a spreading activation model which accounted for a number of early speech error results, including the relative proportions of anticipations, perseverations and exchanges found in speech error corpora, the lexical bias effect, the phonological similarity effect, and the effect of speech rate on error rate. This model has had an immense influence on the past 20 years of research into word production, with the original paper being cited over 1,000 times. Many studies have questioned how activation should flow between words and phonemes in this model. This thesis aimed to clarify what current speech error evidence tells us about how activation flows between phonemes and subphonemic representations, like features. Does activation cascade from phonemes to features, and does it feed back? The work presented here extends previous modelling investigations in two ways. Firstly, whereas previous modelling research has tended to evaluate model behaviour using arbitrarily chosen parameter settings, we illuminate the influence of the parameters on model behaviour and propose methods to draw general conclusions about model behaviour from large numbers of simulations at orthogonally varied parameter settings. Secondly, we extend the scope of the simulations to consider output at a subphonemic level, modelling recent data acquired via acoustic and articulatory measurements, such as voicing onset time (VOT), electropalatography (EPG) and ultrasound, alongside older transcribed speech error data. Throughout the thesis, we consider whether parameter settings which lead the model to capture individual results also permit other results to be accounted for and do not cause otherwise implausible behaviour. Through manipulating parameter settings in Dell's (1986) original model, we find that increasing the number of steps before selection generally does not decrease the error rate, but rather increases it, contrary to results reported by Dell (1986). This calls into question the claim that an increase in steps before selection provides a good model of a slower speech rate. We also demonstrate that the model captures the negative correlation reported by Dell, Burger, and Svec (1997) between error rate and the ratio of anticipations to perseverations, and further predicts that there should be a negative correlation between this ratio and the proportion of errors which are non-contextual. However, our results show that no parameter setting allows the model to generate enough exchanges to match even minimum estimates from a reanalysis of multiple speech error corpus reports, without falling foul of other constraints; in particular, limits on the overall number of errors generated. We suggest that the exchange completion triggering mechanism proposed by Dell (1986) is not strong enough, and that current corpus evidence provides little support for his account of word sequencing. Focusing on single word production therefore, the second part of the thesis investigates behaviour of models with output at a subphonemic level. We find that, provided sufficient contextual errors occur at the featural level, a model in which only the identity of the selected phoneme is conveyed to the featural level can account for: (i) the phonological similarity effect found in transcribed records of speech errors (whereas in models with output at the phoneme level, feedback from features to phonemes is required); (ii) detectable influences of intended phonemes in VOT measurements of unintended phonemes, as well as the effect of error outcome lexicality on these results ( findings presented in support of cascading from phonemes by Goldrick & Blumstein, 2006); and (iii) increased similarity of EPG measurements of articulations to reference measurements of competing articulations when production of the competing onset would result in a word (McMillan, Corley, & Lickley, 2009). Initial results appear to con firm however that, in contrast, phonological similarity effects on the relationship of articulatory and acoustic measurements of productions to reference measurements (McMillan, 2008) can only be accounted for in an architecture with feedback from features to phonemes. To strengthen conclusions about articulatory evidence of lexical bias and phonological similarity effects, future work needs to consider the extremely strong effects of frequency observed in these simulations. The results presented in this thesis contribute to a greater comprehension of the behaviour of Dell's (1986) influential model, and further demonstrate that the model can be extended to account for new instrumental evidence, whilst clarifying the constraints on activation flow between phonemes and features which this new evidence imposes.

Revolutionary goals of Indigenous movements against colonial oppression during historic periods of insurgency are complicated by the fact that Indigenous women continue to suffer at the hands of those who claim to be the oppressed. Rukiah S. Kertapati describes Indonesia’s movement for independence from Dutch rule in Kedjatuhan dan Hati, while contemporary literature, such as Eden Robinson’s “Queen of the North” examines the oppression of Indigenous peoples of Canada. Women’s interests in intervening in the momentum of revolutionary violence may be interpreted in different ways – from subversive, to reactionary, to dissenting. However, women’s literary voices resist the impact of colonial oppression by illuminating the need for social change that emerges with awareness, combines emotion with intelligence, and recognizes the political relevance of personal experience. / Graduate

This study deals with the implications of implementing the World Heritage site of Laponia in northern Sweden. Laponia, consisting of previously well-known national parks such as Stora Sjöfallet and Sarek, obtained its World Heritage status in 1996. Both the biological and geological significance of the area and the local Sami reindeer herding culture are included in the justification for World Heritage status. This thesis explores how Laponia became an arena for the long-standing Sami ethno-political struggle for increased self-governance and autonomy. In many other parts of the world, various joint management schemes between indigenous groups and national environmental protection agencies are more and more common, but in Sweden no such agreements between the Swedish Environmental Protection Agency and the Sami community have been tested. The local Sami demanded to have a significant influence, not to say control, over the future management of Laponia. These were demands that were not initially acknowledged by the local and national authorities, and the negotiations about the management of Laponia continued over a period of ten years. This thesis shows how the local Sami initially were marginalized in the negotiations both because of their alleged “difference” and because of their alleged “similarity” to the majority population. By navigating through what can be described as “a politics of difference,” the Sami involved eventually succeeded in articulating their cultural and historical difference in such a way that they were perceived as different but equal in relation to the other actors. By describing the many twist and turns of the negotiations between the local Sami and the local authorities, this thesis shows how the involvement of international agencies and global protection aspirations, such as the World Heritage Convention, might establish a link between the local and international levels that to a certain extent bypasses the national level and empowers indigenous/local peoples and their ethno-political objectives. As such, this study demonstrates how local/indigenous peoples’ involvement in environmental protection work is above all a political issue that ultimately leads to a situation where their relation with the state authorities is reshaped and reassessed.

Diss. (sammanfattning) Stockholm : Karolinska institutet, 2005. / Härtill 5 uppsatser.

Thesis (doctoral)--Universität Jena, 1934. / At head of title: Aus dem zahnärtzlichen Institut der Universität Jena. "Lebenslauf": p. 34.

Thesis (doctoral)--Karolinska Institutet, Stockholm, 1988. / Extra t.p. with thesis statement inserted. Includes bibliographical references.

Thesis (M. Phil.)--University of Hong Kong, 1995. / Includes bibliographical references (leaf 77-81).

Thesis (Ph. D.)--University of California, San Diego, and San Diego State University, 2009. / Title from first page of PDF file (viewed May 8, 2009). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 244-259).

Thesis (Ph.D.)--Mississippi State University. Department of Instructional Systems, Leadership and Workforce Development. / Title from title screen. Includes bibliographical references. Also available in print.

Thesis (doctoral)--Universität Jena, 1934. / At head of title: Aus dem zahnärtzlichen Institut der Universität Jena. "Lebenslauf": p. 34.