The purpose of the present investigation was to examine whether across-trials inconsistency in reaction time (RT), in addition to level of cognitive performance, is predictive of older adults’ performance on a measure of everyday problem solving through a series of three investigations. A sample of community dwelling non-demented older adults, ranging in age from 62 to 92, completed the Everyday Problems Test (EPT), a measure of everyday problem solving that indexes instrumental activities of daily living (IADLs). Performance on the EPT varied according to age, cognitive status, and education, and was significantly predicted by measures of global cognitive status, cognitive decline, and various basic cognitive abilities (i.e., speed of processing, fluid abilities, episodic memory, crystallized abilities). Both inconsistency and mean latencies on measures of RT were found to be significantly associated with concurrent EPT performance, such that slower and more inconsistent RTs were associated with poorer everyday problem solving abilities. Finally, inconsistency in RT made a unique contribution in predicting performance on the EPT two years later, over and above age, education, and various basic cognitive abilities. Structural equation modeling analyses indicated that the relationship between inconsistency in RT and future EPT performance was mediated by fluid and crystallized abilities. Neither inconsistency nor cognitive functioning were significantly associated with changes in EPT performance across two years. Examination of the relationships between IADL functioning, as assessed through self- and informant-report, and inconsistency and basic cognitive abilities demonstrated that everyday problem solving and measures of IADLs tap into related but distinct constructs. The overall pattern of results obtained lends support to the idea that inconsistency in RT represents a behavioural marker of neurological dysfunction. In addition, the present investigation is the first to suggest a relationship between inconsistency in RT and real-world outcomes, such as everyday problem solving and IADL functioning.

Relationships between the terms culture and education are often taken for granted in educational research. This study challenges some of the taken for granted assumptions around the term culture in educational contexts, particularly in secondary language arts education. It examines these assumptions through an analysis of three debates from the contemporary culture wars in education. The implications of these debates on uses of the term culture in secondary language arts education are examined through Othello as a secondary school text. I am arguing that these debates, namely, on the literary canon, multicultural education, and cultural literacy, represent intractable conflicts over definitions of the term culture. In light of these conflicts, the aim of this study is to provide language arts educators with analytical tools for developing greater theoretical rigour when defining the term culture in language arts education. Drawing on recent theoretical writings on culture, concepts of cultural capital, cultural rights, and cultural reproduction are proposed as analytical tools. I then apply these to develop a methodological approach by which to structure my analysis of Othello as a school text. The study makes a theoretical contribution by bringing into sharper focus ways in which the ideological opposition between expressions of cultural right versus cultural left perspectives is articulated in language arts education, as well as illustrating that claims about culture in the canon debate reflect competing normative assumptions; in the multicultural education debate they reflect competing essentialist constructions; and in the cultural literacy debate they reflect competing empowerment goals. Such cultural debates have a long history and thus the study also situates the contemporary culture wars in education within a wider historical context by tracing related conflicts in the history of literary criticism on and performances of Othello over the past four centuries.

Gender has developed as an important ‘public and political’ category throughout the Twentieth Century in BC and Canada as the basis of feminist demands on society and governments. In 2007, gender has become ‘privatized’ and increasingly erased from government institutions. The de-politicization of gender in Canada is an example of a shifting social consciousness and political discourse that avoids a critical perspective on the social context and places an increasing emphasis on the individual. A new critical discourse must grapple with these challenges, emerge at some distance from government and coincide with a political activism that has resonance in women’s lives.

Gray whales (Eschrichtius robustus Lilljeborg) forage predominantly on hyper-benthic mysids (Mysidae) along the southwest coast of Vancouver Island, British Columbia. The role of mysids in the abundance and distribution of foraging gray whales prompted interest in this study. I relate the inter- and intra-annual foraging behaviour of gray whales to the number of mysid patches and biomass through boat based surveys of foraging whales, and the application of acoustic techniques for estimating mysid prey. I examine the spatial pattern of foraging gray whales and the 10 m isobath. The abundance and distribution of mysid patches are more common at a water depth of 10 m, and the likely mechanism driving the spatial pattern between foraging gray whales and the 10 m isobath. I examine whale abundance and distribution patterns during three consecutive foraging seasons. More whales forage in years when mysid prey are more abundant, and mysid patches are of larger size and higher in biomass. Whales have a considerable top-down effect on mysid populations. Years of heavy whale predation depletes mysid stocks. Mysid populations tend to increase in years of low whale activity. I examine whale abundance and distribution patterns of habitat use during a foraging season along the southwest coast of Flores Island and Nootka Sound. The abundance of mysid patches and biomass in Nootka Sound does not influence the whales’ use of Flores Island; rather the whales exploited both areas concurrently. This study expands the understanding of gray whale habitat use along the southwest coast of Vancouver Island, British Columbia.

A 616-year Douglas-fir (Pseudotsuga menziesii) chronology was developed to examine the history of drought and moisture variability in the Sooke Watershed, near Victoria, British Columbia. Ring-width chronologies were compared to historical precipitation, air temperature and drought variables (Palmer Drought Severity Index (PDSI) and Standardized Precipitation Index (SPI)) to determine the climate/radial-growth response to moisture stress on the sampled stands. Correlations between the ring-width chronologies and climate variables revealed that May to July precipitation, May-June SPI and July PDSI were significant limiting factors to radial-width growth. A transfer function was established for each of these variables to create a proxy climate reconstruction of drought in the watershed. The summer precipitation model provided the most accurate representation of past moisture variability (R2 = 0.20) and reveals substantial variation in precipitation over the past six centuries. Evidence from the periodicity of the tree-ring record to suggest that some modes of atmospheric circulation are influencing precipitation supply to the watershed.

This investigation examined the acute physiological demand associated with a typical Freeride Mountain Bike (FMB) ride. Measures of cardiovascular strain (heart rate, RPE) and neuromuscular fatigue (quarter squat and handgrip MVICs) were assessed in 22 experienced mountain bikers during an observed ride on Mt. Fromme in North Vancouver, British Columbia. The ride involved an initial ascent of 350 vertical meters over horizontal distance of 5.93km, (mean duration 46.61 min). The descent covered a 350m loss in elevation through intermediate to expert level trails spanning a horizontal distance of 4.24km, (mean duration 28.55 min). Heart rate monitoring was continuous. Blood Lactate was assessed pre-ride, at the top of the ascent (mid-ride), and following the descent (post-ride). RPE was assessed mid-ride and post-ride. Handgrip and quarter squat MVICs were taken pre-ride and post-ride. An a priori alpha of .05 was set for all statistical tests. Both measures of neuromuscular strain decreased pre-post ride, equal to 2.8% in quarter squat MVIC and 6.1% and 4.3% in handgrip MVIC for the right and left hands respectively. Blood lactate increased from rest to mid-ride and decreased from mid-ride to post-ride. The mean heart rates (- 80% PHRmax) and RPEs (-14.5) associated with the ascent and descent were not significantly different. The acute physiological and ride pattern data indicate that FMB satisfies the American College of Sports Medicine's guidelines for increasing cardiovascular health and fitness.

In British Colombia, youth are subject to risks that influence their capacity to develop into healthy adults. Community-based youth projects play an important role in supporting youth to develop the motivation, skills and knowledge to overcome challenges in their lives and surroundings. In this grounded theory study 1 examined how community-based youth projects can assist youth to make and maintain positive changes in their lives. Data were collected from staff as well as from people in the community involved with youth in the projects. The findings demonstrate that adults staff and people in the community) involved with the projects engage in a process, named in this thesis as "Supporting Transformation", a process that includes the following categories of action: "Figuring it Out", "Creating Willingness to Engage", 'Introducing a New Way", and "Maintaining Willingness to Engage". By articulating the process of Supporting Transformation, it is hoped that adults will increase their understanding of how to create the conditions that lead to sustainable change in youth.

The purpose of this phenomenological study was to explore the experience of front-line practitioners working with suicidal children and youth. Five front-line practitioners who had experienced working with children or youth who were suicidal participated in the semi-structured interviews. Transcripts of the interviews were analyzed and summarized under the following three areas of experience: Participants' Descriptions of Working with Suicidal Children and Youth, Knowledge Valued by Participants' to Inform their Practice with Suicidal Children and Youth, and Participants' Physical and Emotional Responses to Suicidal Children and Youth. There were a total of sixteen emergent theme clusters. The themes related to the experience of practice with suicidal children and youth provided a rich context for understanding the nature of meaning of the suicidal behaviors for participants. The emergent themes relating to the knowledge valued by participants to guide their approach provided a specific understanding of the multiple sources of knowledge participants were drawing from in the encounters. The emergent themes relating to the physical and emotional responses participants experienced in relation to their encounters with a suicidal child or youth provided an awareness of the impact the encounters had on participants. The major findings included the participants' broad scope of knowledge they used to guide their approach, as well as that encounters with suicidal children and youth did evoke strong physical and emotional responses amongst participants. The study concludes by describing the implications of these findings for Child and Youth Care practice and for future directions in research.

This study applied the use of a stable isotope mass-balance model to calculate water throughflow, residency and water-yield and to assess acid-sensitivity for 50 lakes in the Athabasca Oil Sands region of northeastern Alberta. The research project was aimed at improving existing regional hydrologic estimates, based on coarse-scale runoff values derived from river gauging stations. Regional isotopic variations measured for components of the water cycle indicated a wide range of hydrologic conditions prevail, from throughflow, high water-yield lakes (186 mm.yr-1) to evaporative, low water-yield systems (23 mm•yr-1). Notably, hydrology is shown to be a controlling factor on acid-sensitivity and may be altering acid-sensitivity via such processes as water flow through peatland dominated catchments or convergence with acidic neutralizing soils, geology or ground waters. At the throughflow end of the hydrologic spectrum at low levels of isotopic enrichment, isotopes in precipitation were sensitive up to 30%. Relative humidity, on the other hand, is sensitive at high levels of enrichment at the evaporative end of the scale on the order of 25%. This application, in conjunction with landscape and chemical analysis, highlighted the over-riding hydrologic processes occurring at lowland and upland systems of the Boreal Plain that may lead to increased acid-sensitivity or buffering capacity. This thesis documents the first ever demonstration of an isotope mass-balance model to estimate water-yields and subsequently assess critical acid loadings in North America. The results of this research project will allow for improved predictive ability and management of acid-sensitive aquatic ecosystems within future planning frameworks.

The purpose of the present investigation was to examine whether across-trials inconsistency in reaction time (RT), in addition to level of cognitive performance, is predictive of older adults’ performance on a measure of everyday problem solving through a series of three investigations. A sample of community dwelling non-demented older adults, ranging in age from 62 to 92, completed the Everyday Problems Test (EPT), a measure of everyday problem solving that indexes instrumental activities of daily living (IADLs). Performance on the EPT varied according to age, cognitive status, and education, and was significantly predicted by measures of global cognitive status, cognitive decline, and various basic cognitive abilities (i.e., speed of processing, fluid abilities, episodic memory, crystallized abilities). Both inconsistency and mean latencies on measures of RT were found to be significantly associated with concurrent EPT performance, such that slower and more inconsistent RTs were associated with poorer everyday problem solving abilities. Finally, inconsistency in RT made a unique contribution in predicting performance on the EPT two years later, over and above age, education, and various basic cognitive abilities. Structural equation modeling analyses indicated that the relationship between inconsistency in RT and future EPT performance was mediated by fluid and crystallized abilities. Neither inconsistency nor cognitive functioning were significantly associated with changes in EPT performance across two years. Examination of the relationships between IADL functioning, as assessed through self- and informant-report, and inconsistency and basic cognitive abilities demonstrated that everyday problem solving and measures of IADLs tap into related but distinct constructs. The overall pattern of results obtained lends support to the idea that inconsistency in RT represents a behavioural marker of neurological dysfunction. In addition, the present investigation is the first to suggest a relationship between inconsistency in RT and real-world outcomes, such as everyday problem solving and IADL functioning.