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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Motor learning and its transfer during bilateral arm reaching.

Harley, Linda Rosemary 09 June 2011 (has links)
Have you ever attempted to rub your abdomen with one hand while tapping your head with the other? Separately these movements are easy to perform but doing them together (bilateral task) requires motor adaptation. Motor adaptation is the process through which the Central Nervous System improves upon performance. Transfer of learning is the process through which learning a motor task in one condition improves performance in another condition. The purpose of this study was to determine whether transfer of learning occurs during bilateral goal-directed reaching tasks. It was hypothesized that transfer of learning would occur from the non-dominant to the dominant arm during bilateral tasks and that position and load feedback from the arms would affect the rate of adaptation and transfer of learning. During the experiments, subjects reached with one or both their index finger(s) to eight targets while a velocity dependent force perturbation (force environment) was applied to the arm(s). Three groups of bilateral tasks were examined: (1) unilateral reaching, where one arm learned to reach in a force environment, while the other arm remained stationary and therefore did not provide movement related position or load feedback; (2) bilateral reaching single load, where both arms performed reaching movements but only one arm learned a force environment and therefore the other arm provided movement related position feedback but not load feedback; (3) bilateral reaching two loads, where both arms performed reaching movements and both learned a force environment, while providing movement related position and load feedback. The rate of adaptation of the force environment was quantified as the speed at which the perturbed index finger trajectory became straight over the course of repeated task performance. The rate of adaptation was significantly slower for the dominant arm during the unilateral reaching tasks than during the bilateral reaching single load tasks (p<0.05). This indicates that the movement related position feedback from the non-dominant arm improved significantly the motor adaptation of the dominant arm; therefore transfer of learning occurred from the non-dominant to the dominant arm. The rate of adaptation for the non-dominant arm did not differ significantly (p>0.05) between the unilateral reaching and bilateral reaching single load tasks. Results also indicated that the rate of adaptation was significantly (p<0.05) faster for both the non-dominant and the dominant arms during the bilateral reaching two loads tasks than during the bilateral reaching single load tasks. The latter results indicate that transfer of learning occurred in both directions - from the dominant to the non-dominant arm and from the non-dominant to the dominant arm - when position and load feedback was available from both arms, but only when the force environment acted in the same joint direction. This study demonstrated that transfer of learning does occur during bilateral reaching tasks and that the direction and degree of transfer of learning may be modulated by the position and load feedback that is available to the central nervous system. This information may be used by physical therapists in order to improve rehabilitation strategies for the upper extremity.
42

Break down the walls : how the “folder effect” influences the transfer of learning

He, Jingjie 08 July 2011 (has links)
Categorizing knowledge into different disciplines and units may block knowledge within separate “folders”, which could limit its later retrieval and transfer to new contexts. To test this hypothesis, two experiments had been conducted. In one experiment, participants memorized a list of words with or without cuing which category these words belonged to. One week later, they were asked to recall all the positive adjectives, which required them to retrieve words that came from different categories. In the other experiment, participants read exactly the same story but embedded in two different subject domains or no context. A survey report was presented to test whether people from different contexts would have different transfer effect. The current study replicated previous results that successful transfer was hard to observe in the laboratory settings without explicit prompts. The memory test and transfer task in this study were too difficult and resulted into to the poor performance of the participants. The initial hypothesis had been neither supported nor rejected. To test the hypothesis, future studies could reduce the time interval between study and test, and modified the transfer task to lower the difficulty of the experiment. / text
43

L2 ultimate attainment and the syntax-discourse interface : the acquisition of topic constructions in non-native Spanish and English

Valenzuela, Elena. January 2005 (has links)
This thesis investigates the syntax-discourse interface in adult, end state second language (L2) acquisition. Specifically, it examines topic constructions in Spanish and English, namely Clitic Left Dislocation (CLLD) and Contrastive Left Dislocation (CLD), which exhibit both syntactic and discourse level properties. In both cases, topics occur at the left periphery of clauses and reintroduce a subset of a known set previously mentioned in discourse. Sensitivity to specificity is available in Spanish but not in English. The interpretation of the topicalized element as either generic or specific depends on the presence or absence of the clitic. Data from a bidirectional study are reported in order to investigate the issue of L1 transfer as well as the question of whether acquiring a new property is easier than losing a property. / Three current theories of acquisition are examined, namely, the Full Transfer/Full Access model (FT/FA), Failed Functional Features Hypothesis/Representational Deficit Hypothesis (FFFH/RDH), and Optionality theory. The theories are considered with respect to their predictions about L2 ultimate attainment and the syntax-discourse interface. / Participants were 15 end state speakers of L2 Spanish/L1 English and 15 end state speakers of L2 English/L1 Spanish were tested. Three tasks were administered for each study (Sentence Completion Task, oral Sentence Selection Task, and oral Acceptability Task) targeting topic constructions and associated interpretive properties in the respective target languages. Results for the L2 Spanish study indicate that while the syntactic properties of CLLD were acquired, the interpretive properties of specificity were fossilized (i.e. clitic was overgeneralized). Results for the L2 English study also showed that the syntactic properties were acquired but the specificity distinction of the L1 was transferred into the L2. Results demonstrate that problems with specificity occur in both directions as predicted by the theory of Optionality. In both cases, the optionality found at the interpretive level was L1-based. Namely, non-target L1 forms co-existed with the L2 forms.
44

Verb movement parameters in Afrikaans : investigating the Full Transfer Full Access hypothesis

Conradie, Simone January 2005 (has links)
This thesis sets out to test the Full Transfer Full Access hypothesis (FTFA), which claims (i) that second language (L2) learners start out with the parameter settings instantiated in their first language (L1) grammars ('full transfer') and (ii) that they can subsequently reset parameters to the target L2 settings where these differ from the L1 settings, provided the required (triggering) positive evidence is available in the L2 input ('full access'). / Three studies on the L2 acquisition of two verb movement parameters, the V2 parameter and the Split-IP parameter (SIP), are reported. The first study investigates 'full access', testing whether English-speaking learners of Afrikaans, who started acquiring the L2 in early childhood and are thus child L2 learners, can reset the two parameters. The second study investigates 'full transfer' and 'full access' by testing whether English-speaking and German-speaking learners start out with different settings of the two parameters and whether the English-speaking learners can reset the parameters. All participants in this study are adult L2 learners, which facilitates a comparison of child L2 acquisition (first study) with adult L2 acquisition. The third study investigates whether Afrikaans-speaking learners of French can acquire knowledge of the ungrammaticality of certain construction types that are allowed in their L1 but not in the L2 (although the languages share the same parameter setting), despite the fact that there seems to be no positive evidence to this effect in the L2 input. It is argued that, taken together, the studies provide evidence in support of the FTFA. / The original contribution of this thesis lies in (i) investigating both verb movement parameters (instead of only one), (ii) providing a thorough discussion of the relevant syntactic properties of Afrikaans, (iii) investigating the L2 acquisition of Afrikaans, and (iv) addressing the question of how learners go about acquiring a parameter setting ([+SIP]) in cases where both the L1 and the L2 share the parameter setting but the L1 exhibits a superset of the properties exhibited by the L2.
45

Second language acquisition of Japanese relative clauses

Kayama, Yuhko. January 2005 (has links)
This thesis investigates the second language acquisition of Japanese relative clauses (RCs) by native speakers of English or Korean. Researchers have argued that Universal Grammar (UG) can be accessed in adult second language (L2) acquisition. The Full Transfer Full Access (FTFA) Hypothesis (Schwartz and Sprouse 1994, 1996) claims that after initial transfer from L1, learners reset their parameter values and are able to acquire L2 properties that are different from their L1. Japanese and English relativization: while Japanese relativization does not involve movement in the syntax (Kuno 1973, Saito 1985, etc.), English relativization involves obligatory operator movement and is subject to movement constraints like Subjacency. Because of Subjacency, certain RC structures are prohibited in English. In Japanese, on the other hand, a zero pronominal, pro, is base-generated in the gap position of an RC and coindexed with the relative head noun, and thus long distance relativization is possible. I argue that the presence or absence of pro is also a parametric difference between Japanese and English; pro is present in Japanese, but not in English. In order for English speakers to acquire Japanese RCs, they need to reset the values of these two parameters. / Experimental studies were conducted with high-intermediate and advanced learners of Japanese (15 English speakers and 18 Korean speakers). Tests examined the learners' knowledge of the two grammatical properties in Japanese---namely, the lack of wh-movement and the presence of pro. Korean is different from English but similar to Japanese with respect to the parameters in question. Following FTFA, it is hypothesized that English-speaking learners initially transfer their L1 values, and that eventually they are able to switch parameters to the L2 values by accessing UG. The results of several tasks (including interpretation tasks and judgment tasks) confirm this hypothesis; while Korean speakers generally performed well irrespective of proficiency levels, English-speaking intermediate learners transferred their L1 values, failing to accept grammatical Japanese sentences that are not possible in English. English-speaking advanced learners, on the other hand, performed better than intermediate learners, and exhibited evidence that they had acquired the two properties of Japanese, supporting FTFA.
46

Acquisition of segmental structure : consequences for speech perception and second language acquisition

Brown, Cynthia A, 1967- January 1997 (has links)
Through an investigation of the acquisition of feature geometric representations in first and second language acquisition, this dissertation demonstrates how the Feature Geometry theory contained in Universal Grammar actively guides and constrains the acquisition of segmental representations by children. In addition, it demonstrates how the mature feature geometry in a speaker's mental grammar restricts the range of nonnative phonemic contrasts that he or she will be sensitive to in the input and, hence, able to acquire as an L2 learner. / Three related areas of research are explored and integrated in this work: first, a theoretical study explores the feature-geometric representation of sonorant and non-sonorant laterals, based on their behavior in a variety of phonological processes cross-linguistically, and suggests that [lateral] is not a phonological feature, but rather that laterality is a phonetic property that derives from a specific feature-geometric representation; second, an experimental study investigates the acquisition of phonemic contrasts by English children and demonstrates that segmental representations are acquired in a uniform order that is consistent with properties of Feature Geometry; finally, a series of experimental studies examines the perception and acquisition of the English /l-r/, /b-v/, /p-f/, /f-v/ and /s-theta/ contrasts by native speakers of Japanese, Mandarin Chinese and Korean. / The findings from each of these studies are synthesized to obtain a comprehensive picture of how segmental representations are acquired and how this L1 knowledge impinges on the acquisition of L2 phonemes: it is argued that the monotonic acquisition of feature-geometric structure by young children restricts their sensitivity to particular non-native contrasts, and the continued operation of this existing feature geometry in adult speech perception constrains which non-native contrasts adult learners will be sensitive to in the L2 input and, therefore, capable of acquiring; the circumstances in which the native grammar facilitates perception of non-native contrasts and in which acquisition is possible are also discussed.
47

Linguistic characteristics of second language acquisition and first language attrition : Turkish overt versus null pronouns

Gürel, Ayşe. January 2002 (has links)
This thesis investigates the binding of overt and null subject pronouns in second language (L2) acquisition and first language (L1) attrition of Turkish. The aim is to provide a comparative investigation of language transfer effects in the ultimate state of the L2 and L1 grammar. More specifically, it examines transfer effects from English L1 and English L2 into the grammars of Turkish L2 and Turkish L1, respectively. / In this thesis, I propose that the Subset Condition (Berwick, 1985; Manzini & Wexler, 1987) can account for transfer phenomena observed in both L2 acquisition and L1 attrition. I argue that the subset relation that holds between the L1 and the L2 can be a predictor for the extent and duration of cross-linguistic transfer in L2 acquisition and L1 attrition. In other words, whether or not a particular property will resist L2 acquisition and undergo L1 attrition can be determined by looking at the subset relationship between the L1 and the L2 with respect to that property. / The prediction is that in configurations where the 'influencing language' (L1 in L2 acquisition and L2 in L1 attrition) is the superset of the 'affected language' (L2 in L2 acquisition and L1 in L1 attrition), L1 transfer effect will persist in L2 acquisition and we will see more signs of L2 transfer into the L1 grammar, resulting in more attrition effects. / Pronominal binding is chosen to investigate such cross-linguistic transfer effects. English and Turkish differ with respect to governing domains and types of pronominals present in two languages. Turkish, being a pro-drop language, allows null subject pronouns in main and embedded clauses. It also has a special type of anaphoric pronominal, kendisi, for which English has no corresponding form. / Two experiments were conducted to test L2 acquisition and L1 attrition of binding properties of Turkish overt and null subject pronouns under the influence of English. Participants included native English-speakers living in Turkey (end-state L2 Turkish speakers) and native Turkish-speakers living in North America (end-state L2 English speakers). Overall, results obtained from the two studies reveal cross-linguistic transfer effects in the manner predicted. In particular, properties of English overt pronouns (e.g., him/her) are transferred onto the overt Turkish pronoun o in L2 acquisition and in attrition, whereas properties of the Turkish null pronoun and the anaphoric pronominal kendisi are unaffected by English.
48

Transfer of learning in children with fetal alcohol spectrum disorder

McInerney, Robert John 08 May 2007 (has links)
Objective: Fetal alcohol spectrum disorder (FASD) is a permanent developmental disorder that can occur if women drink alcohol while pregnant. Despite substantial variability in FASD as a population, anecdotal evidence and clinical reports suggest that affected individuals have difficulty learning from experience and generalizing information from one situation to another, and tend to make the same mistakes over and over. Consistent with research in cognitive and educational psychology, these difficulties were conceptualized as impairments in “transfer of learning.” This dissertation sought to measure transfer of learning using three experimental transfer measures and an exploratory parental transfer questionnaire. In addition, performance on the experimental transfer measures was investigated in relation to aspects of executive functioning, because abilities thought to underlie successful transfer bear much resemblance to aspects of executive functioning. Participants and Methods: The sample included 16 children diagnosed with FASD and 16 age- and gender-matched control children. Children were screened for intelligence and excluded if their performance on both Vocabulary and Matrix Reasoning from the WISC-IV fell below the 9th percentile. Children completed three transfer tasks: (1) a novel, experimental modification of the Tower of Hanoi involving nested plastic cups and Tupperware containers; (2) a variation of Chen’s (1996) Bead Retrieval Problem; and (3) the Purdue Pegboard. Participants also completed three executive functioning tasks that were selected to measure concept formation and flexibility: (1) Picture Concepts from the WISC-IV; (2) the D-KEFS Color-Word Interference Test; and (3) the Visual-Verbal Test. In addition, parents or caregivers completed an exploratory questionnaire designed to assess children’s transfer of learning abilities in everyday life, along with the ABAS-II, a standardized measure of adaptive functioning. Results: Children with FASD displayed significantly weaker performance on the Transfer Condition of the Tower of Hanoi, even after controlling for intelligence. Group differences were not observed on the Bead Retrieval Problem or on the Purdue Pegboard. On the measures of executive functioning, control children outperformed those with FASD on all measures before controlling for intelligence. In addition, there was a significant relationship between the Tower of Hanoi and the Visual-Verbal Test; the latter was the only executive functioning task related to transfer of learning. This finding, however, did not persist when intelligence was accounted for. After controlling for intelligence, significant group differences also were found on parental ratings of everyday transfer ability and on more complex aspects of adaptive functioning. Conclusions: Two out of four newly created measures in this exploratory dissertation provided partial support for weak transfer of learning in FASD. This was observed on the modified Tower of Hanoi, which shared an identical structure between conditions but differed in surface appearance. Parental ratings also indicated weak transfer of learning, although in children with FASD, these reports did not correlate with transfer abilities on the Tower of Hanoi. Children with FASD also demonstrated weak executive functioning, but this weakness was moderated significantly by intelligence. The relationship between transfer of learning and executive functioning appeared to be driven primarily by cognitive flexibility, although this relationship also was moderated by intelligence.
49

Representation and phonological licensing in the L2 acquisition of prosodic structure

Steele, Jeffrey, 1972- January 2002 (has links)
It is widely recognized that differences in both prosodic complexity and position-sensitive contrasts exist both within and across languages. In contemporary phonological theory, these differences are often attributed to differences between heads and non-heads and the asymmetries in licensing potential that exist between such positions. / In this thesis, the consequences of such differences for the second language (L2) acquisition of prosodic complexity and position-sensitive contrasts are explored. It is argued that an explanatorily adequate account of L2 syllabification must include highly-structured representations as well as a theory of licensing, which distinguishes between the licensing of a given position and the licensing of featural content in such a position. Using data drawn primarily from a number of studies that investigate the acquisition of French by native speakers of English and Mandarin, it is demonstrated that the widely-attested interlanguage (IL) syllable-structure-modification processes of deletion, epenthesis, and feature change have a common source. Specifically, all three processes result from the IL grammar's inability to license a syllable position or (some of) the featural content present in such a position in the target representation. Within Optimality theory, the framework adopted, this is formalized through the competition between Faithfulness constraints and Markedness constraints, which evaluate the wellformedness of the licensing relationships. Finally, it is argued that Prosodic Licensing and the principle of Licensing Inheritance from Harris (1997) work together to encode prosodic markedness in representation, as they create a series of head-dependent asymmetries in which heads are strong licensors vis-a-vis their dependents.
50

Exploring School Principal Preparation and Development in Northern Canada: The Case of Nunavut's Educational Leadership Program (ELP)

Fredua-Kwarteng, Eric 09 January 2014 (has links)
The purpose of this research was to explore how Nunavut Educational Leadership (ELP), a school principal preparation program in Nunavut Territory, Canada, fulfills Inuit (the indigenous people of the territory) educational aspirations. In accordance with this purpose, the study focuses on answering four specific questions: (1) what are Inuit educational aspirations? (2) What is the context for Inuit education? (3) How is the Nunavut Educational Leadership Program organized to meet its objectives? (4) How do the activities of the Nunavut Educational Leadership Program (ELP) fulfill Inuit educational aspirations? Adopting an exploratory case study design grounded in qualitative approaches and undergirded by critical interpretative perspective, the research triangulates both primary and secondary sources of data. The primary data sources come from individual semi-structured interviews of 35 respondents (18 community members, 3 program development members, 3 presenters/facilitators, 7 program participants, and 4 educational officials) selected across Nunavut Territory. These sources are complemented with relevant secondary documents from 1987 to 2010. Using constant comparative and word-in-context as the main data analysis methods, concepts and themes were delineated from the data sources to form categories, with the research questions and conceptual framework guiding the process. The research results revealed, among many other things, that the Nunavut ELP partially fulfills Inuit educational aspirations as defined in the research. Issues arising from the data analysis and interpretation are also discussed under (1) Inuit culturally appropriate education/ self-determination in education, (2) Issues associated with Inuit and mainstream relationship, (3) The relationship between context and principal preparation and development programs, (4) Preparation programs for fulfilling local educational aspirations, (5) Framework for principal leadership practice, (6) Educational Governance Related-Issues, (7) University contribution to principal leadership preparation and development programs, (8) Nunavut ELP goals, and (9) Leadership Conceptualizations. Along with these are recommendations, theoretical implications and directions for future or further research. Though the research does not purport to design an educational leadership program for Nunavut school leaders, its evidence-based analysis and results may assist in any conversations toward the restructuring, improvement or enhancement of the Nunavut ELP as well as any educational leadership development programs in post-colonial societies.

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