Doctor of Philosophy / Department of Psychology / Lester C. Loschky / While watching a film, the viewer begins to construct mental representations of it, which are called events. During the opening scene of a film, the viewer is presented with two distinct pieces of information that can be used to construct the event, namely the setting and an action by the main character. But, which of these two constructs are first cognitively represented by the viewer? Experiment 1 examined the time-course of basic level action categorization with superordinate and basic level scene categorization using masking. The results indicated that categorization occurred in a course-to-fine manner, inconsistent with Rosch et al.’s (1976) basic level theory. Interestingly, basic level action categorization performance did not reach ceiling when it was processed for a 367 ms SOA, suggesting that additional scene information and processing time were required. Thus, Experiment 2 examined scene and action categorization performance over multiple fixations, and the scene information that was fixated for each categorization task. Both superordinate and basic level scene categorization required only a single fixation to reach ceiling performance, inconsistent with basic level primacy, whereas basic level action categorization took two to three fixations, and led to more object fixations than in either scene categorization task. Eye movements showed evidence of a person bias across all three categorization tasks. Additionally, the categorization task did produce differences in the scene information that was fixated (Yarbus, 1967). However, could basic level theory still be correct when subjects are given a different task? When the same scene images were named, basic level action terms were used more often than basic level scene category terms, while superordinate level action terms were used relatively less often, and superordinate level scene category terms were hardly ever used. This shows that linguistic categorization (naming) is sensitive to informative, middle-level categories, whereas early perceptual categorization makes use of coarse high level distinctions. Additionally, the early perceptual advantage for scene categorization over basic level action categorization suggests that the scene category is the first construct that is used to represent events in scene images, and maybe even events in visual narratives like film.

Natural categories seem to be comprised of clustered stimuli that contain a myriad of correlated features; birds, for example, tend to fly, have wings, lay eggs, and make nests. Nonetheless, the evidence that people use these correlations during intentional category learning is overwhelmingly negative (Murphy, 2002). People do, however, show evidence of correlational sensitivity during other types of category learning tasks (e.g., feature prediction). The usual explanation is that intentional category learning tasks promote rule use, which discards the correlated feature information; whereas, other types of category learning tasks promote exemplar storage, which preserves correlated feature information. However, all of the intentional category learning tasks employed to examine correlational sensitivity to date have only used deterministic mappings of stimuli to categories (i.e., each stimulus belongs to only one category). The current thesis is concerned primarily with the effects introducing the probabilistic assignment of stimuli to categories on the acquisition of different types of correlational knowledge. If correlational knowledge depends on whether or not people selectively attend to the correlation then probabilistic reinforcement, which is predicted to increase attention shifting (Kruschke & Johansen, 1999), should lead to increased correlational sensitivity. The first paper of this thesis confirms that selective attention provides a way to explain the presence or absence of correlational knowledge in different tasks. However, selective attention models have been unable to account for tasks in which people use the correlation between a non-relevant cue and regions of the category space to switch between the application of multiple rules. This phenomenon, known as knowledge partitioning, is explored in the second paper of this thesis. This thesis also extends the empirical implications of the first two papers to existing research (see included paper 3) and also provides recommendations of how utilize this conceptualization of knowledge for practitioners in the applied setting (see included paper 4). Finally, in addition to increasing attention shifting, probabilistic feedback is also assumed to result in an attenuation of learning over time (Kruschke & Johansen, 1999); the fifth paper in this thesis provides empirical confirmation that people attenuate learning in response to unavoidable error.

A fundamental requirement of any autonomous robot system is the ability to predict the affordances of its environment, which define how the robot can interact with various objects. In this dissertation, we demonstrate that the conventional direct perception approach can indeed be applied to the task of training robots to predict affordances, but it does not consider that objects can be grouped into categories such that objects of the same category have similar affordances. Although the connection between object categorization and the ability to make predictions of attributes has been extensively studied in cognitive science research, it has not been systematically applied to robotics in learning to predict a number of affordances from recognizing object categories. We develop a computational framework of learning and predicting affordances where a robot explicitly learns the categories of objects present in its environment in a partially supervised manner, and then conducts experiments to interact with the objects to both refine its model of categories and the category-affordance relationships. In comparison to the direct perception approach, we demonstrate that categories make the affordance learning problem scalable, in that they make more effective use of scarce training data and support efficient incremental learning of new affordance concepts. Another key aspect of our approach is to leverage the ability of a robot to perform experiments on its environment and thus gather information independent of a human trainer. We develop the theoretical underpinnings of category-based affordance learning and validate our theory on experiments with physically-situated robots. Finally, we refocus the object categorization problem of computer vision back to the theme of autonomous agents interacting with a physical world consisting of categories of objects. This enables us to reinterpret and extend the Gluck-Corter category utility function for the task of learning categorizations for affordance prediction.

Thesis (M.A.)--Miami University, Dept. of Speech Pathology and Audiology, 2006. / Title from first page of PDF document. Includes bibliographical references (p. 44-50).

College students were exposed to training designed to teach nine simple discriminations, such that sets of three arbitrary visual stimuli acquired common functions. For seven of eight participants, three 3-member contingency classes resulted. When the same stimuli were presented in a match-to-sample procedure under test conditions, four participants demonstrated equivalence-consistent responding, matching all stimuli from the same contingency class. Test performance for two participants was systematically controlled by other variables, and for a final participant was unsystematic. Exposure to a yes/no test yielded equivalence-consistent performance for one participant where the match-to-sample test had not. Implications for the treatment of equivalence as a unified, integrated phenomenon are discussed.

‘Nederlanders and buitenlanders: A sociolinguistic ethnographic study of ethnic categorization among secondary school pupils’ is a study based on nine months of ethnographic fieldwork among pupils of the vocational track of a secondary school in Venlo, the Netherlands. Many of these pupils had a migration background, and though they were born in the Netherlands, they often referred to themselves as buitenlander (‘foreigner’), Marokkaan (‘Moroccan’), or Turk (‘Turk’), and referred to others without migration backgrounds as Nederlanders (‘Dutch people’).In this dissertation, van de Weerd combines ethnographic descriptions of the local context with ethnomethodological analyses of interactions to analyze such self- and other-categorizations. Although the use of categories such as Nederlander and buitenlander are commonly interpreted as straightforward indications of (dis) identification with a country or ethnic identity, it is argued that their meanings are constructed and negotiated in local interactions and are therefore much more complex. The pupils in this study, for instance, regularly discussed categories in association with certain clothing styles, language, or behavior, or jokingly teased each other by speaking negatively about these categories. The dissertation furthermore analyzes the relation between categorization practices and the use of different linguistic resources such as Dutch, Limburgish, Turkish, Arabic, and/ or Berber. ‘Nederlanders and buitenlanders’ may be of relevance to researchers interested in categorization in interaction, ethnicity, identification, the effects of diversification outside the metropolitan area, and more broadly, linguistic ethnography and sociocultural linguistics. / Dans Néerlandais et étrangers, j'étudie la façon dont les élèves du secondaire à Venlo, ‘classe 3/4b,’ se sont référés aux hiérarchies sociales locales et sociétales, et comment ils ont traité ce sujet, en se catégorisant eux-mêmes et les uns les autres en termes ethniques et en utilisant différents moyens linguistiques. La question de recherche, introduite dans le Chapitre 1, est la suivante: Quelles sont les significations et les fonctions respectives des catégories ethniques et des moyens linguistiques utilisés pour les élèves et les enseignants de la classe 3/4b ?J'ai mené cette étude sur la base des données recueillies pendant neuf mois de travail ethnographique sur le terrain avec les élèves, et en analysant les interactions entre les élèves, les enseignants et moi-même, principalement avec l'analyse de la catégorisation des membres (ACM) et l'analyse de la conversation (AC).À peu près la moitié des élèves de la classe 3/4b sont d'origine étrangère et, bien qu'ils soient nés aux Pays-Bas, ils se classent régulièrement, eux- mêmes et les autres, sous les étiquettes ‘étranger’, ‘Marocain’ et ‘Turc’, et qualifient les autres (mais pas eux-mêmes) de ‘Néerlandais’. Cette catégorisation faisait partie des interactions quotidiennes, que ce soit en se taquinant, en faisant ses devoirs ou en racontant des ragots sur des connaissances. L'utilisation de divers moyens linguistiques (en plus du néerlandais standard, les élèves ont utilisé l'arabe, le berbère, le turc, et les dialectes régionaux de Venlo et Tegelen, entre autres, dans leurs interactions) s'est également avérée importante pour élaborer ces catégories et en discuter. / Doctorat en Langues, lettres et traductologie / info:eu-repo/semantics/nonPublished

The purpose of this thesis is to investigate Sweden’s ability to adopt positive actions based on gender and ethnicity into national legislation, in regard to EU regulations. The possibility to use positive actions is established at an EU level by both treaties and directives. EU-case law narrows the practical use of the measure. Sweden has chosen to implement positive action based on gender but not ethnicity in their national legislation, despite the fact that the allowed extent to use it would have been the same. The purpose is further to gain a deeper understanding of the problems, as well as the beneficiary effects, that positive actions based on ethnicity could lead to. The thesis applies a combination of both legal method and sociology of law perspectives. Intersectional perspectives have been applied in the thesis to obtain further knowledge about the structural discrimination of ethnic minorities in Sweden. The thesis includes an investigation of the legal grounds of positive actions based on gender to enable comparisons but the main focus will be on positive actions based on ethnicity. The Swedish discussion on positive action based on ethnicity is mainly focusing on the problem of compiling statistics on people’s ethnicity, which may be a necessary consequence of the measure to achieve explicitness. The most obvious benefit with positive action based on ethnicity is that it aims to improve the situation on the labor market of disadvantaged groups. People with foreign ethnical backgrounds are systematically discriminated in the Swedish society and since Sweden currently is facing a great migratory movement, the need for measures against systematic discrimination grows. Dividing the population into different categories can lead to segregation rather than integration on the labor market. The problem arises when the will to create opportunities for foreigners contradicts the Swedish fear of categorizing people. Possible solutions with perhaps more long-term outcomes could be to increase employers awareness of the positive economic effects of diversity in the workforce and also to increase awareness among the Swedish population about the systematic discrimination of foreigners to change social norms.

Purpose - The purpose of this thesis is to explore what performance indicators that exist within public procurement in defence sector context and how such performance indicators can be categorized.   Methodology - For the purpose of this thesis, an abductive approach was applied. This thesis is characterized as an exploratory multimethod qualitative research, which emphasize a single case study and a comprehensive research literature review. The empirical data was collected using semi-structured interviews, observations and documentary. The empirical data was analyzed using a data display and analysis, whereas a descriptive and content analysis was used for the research literature review.     Findings - Initially, a comparison between the conducted research literature review and the empirical study resulted in 117 performance indicators were abled to be identified. Furthermore, with support from the research literature review, the empirical study and the frame of reference, categorizations of performance indicators were possible. Through research literature review, the author were able to identify eight dimensions cost, quality, time, flexibility, sustainability, innovation, risk and compliance, all of which can be aligned to public procurement. Through the empirical study, seven elements were identified as categories. These elements include business strategy and development, operations management, category management, supplier management, customer management, procurement and expert and system support, all of which with aligned performance indicators.  Through the frame of reference, three decision-levels were used as categorization of performance indicators. The decision-levels could either be strategic, tactical or operational. Finally, a merger of decision-making levels and elements resulted in a conceptual model, visualizing how elements with aligning performance indicators within public procurement could be organized and structured.    Research limitations - At first, this thesis uses only one database for the research literature review, limiting the search result of publications concerning the research topic of this thesis. Secondly, single cases study within the defece sector, which limits the amount of information and may prevent transferability possibilities for other public procurement organizations.   Future research - From the result of this thesis, several potential research opportunities has been discovered. First, following-up and measure PIs in public procurement in order to justify the “real” compliance to rules and regulation. Another one is possible challenges with implementing PIs in public procurement organizations. Lastly, measuring process maturity in public organization would allow benchmarking possibilities among public organizations and defece sector procurement.

Conversation analytic (CA) and ethnomethodological (EM) techniques are employed in this study to explore the ways speakers within and between interactional turns build and resist gender category by resisting its activities/predicates. It aims to reveal how a sex-reassigned child’s identity is pertinent to the construction of membership categorization and the doing of resistance towards category-bound activities/predicates.  The study attempts to explain how the child tries to design her answers in a way that - both explicitly and implicitly - resist both the gender membership categorization she is being assigned to be and its ties (predicates/activities) she is being asked to accomplish. Membership categorization analysis (MCA), formulated by Sacks (1979), is employed here to show that the identity categories used in talk are tools by which participants organize and perform activities/predicates to establish their categories. The human subject that this project concentrates on is an immigrant family having a sex-reassigned child called Aidan. The data, which is analyzed, was collected during a dispute around the haircut and clothing style for the sex-reassigned child between the child and the parents. During the interaction the parents try to generate the category predicates for building up a set of activities around what might be considered ‘normal’ within a community that enables them to define and validate the child particular membership category. The main resistance strategies adopted by the child are dispreferred actions such as refusals mainly through accounting (e.g., justification and explanation) and disagreement.

Scholars in the field are of the opinion that the early simultaneous bilingual and bicultural exposure not only does not harm the bilinguals, but also strengthens their social and cultural foundations and keeps them from getting vulnerable to external environment (Deuchar and Quay 1999, 2000; Genesee 1989; Genesee, Nicoladis, and Paradis 1995; Holowka, Brosseau-Lapre ́, and Petitto 2002; Lanza 1992; Meisel 1989; Petitto et al. 2001). Also it has been demonstrated that bilingual children have differentiated systems to provide them with the ability to distinguish between their two input languages from the beginning of language acquisition (Petitto & Holowka, 2002). However, the driver of the children’s language preference patterns at home needs to be further explored. The present study is indeed an attempt to answer the question of why it is that some children regularly exposed to their heritage language from a very young age actually continue to actively use it, and other children involving in similar parental policy about bilingualism do not? It aims to examine the impacts of parental language strategies during the childhood on children language preference at home after they achieve the key competences in each of the two languages. The foci are parental attitudes towards the patterns of language choice and their influence on child language preference. Data are collected from two Iranian immigrant families; one has been experiencing additive bilingualism, while the other has been involved in the process of subtractive phenomenon. Some implications for parent-child closeness, heritage language and the risk of language contamination are touched on briefly.