Psychology Commons^™

Vapourized Cannabis Extract Administration Impairs Memory And Alters Neural Activity In Laboratory Rats, Megan Chladny

Theses and Dissertations (Comprehensive)

Although people have smoked cannabis for millennia, administration of cannabis by heating the dried plant material or distilled extracts to a temperature just below the combustion point (i.e., vapourization or "vaping") has rapidly increased over the past few years (Javadi-Payder, Cole, and Taffe, 2018; Manwell, Charchoglyan, Brewer, Matthews, Heipel, and Mallet, 2014). Conversely, most of the cannabinoid research using rodent models has used parenteral routes of administration to examine the effects of purified cannabis extracts such as ∆⁹-tetrahydrocannabinol (THC), making it difficult to directly compare laboratory research to human drug use. Building on previous studies showing that THC …

The Electrophysiological Correlates Of Text Integration And Direct Vs. Indirect Articles: A Centralized And Lateralized Examination, Deanna C. Hall

Theses and Dissertations (Comprehensive)

As we read, we develop mental models of the discourse content called situation models. Situation models are integral to how we keep track of information, and to do so in an ongoing event incoming information needs to be integrated into the model or discarded. The type of information being presented, and its relation to prior data, impacts how that new information is processed. The current research examined discourse passages containing concepts that were either previously mentioned (match), mentioned with a general term (general category), unmentioned in lieu of another concept (mismatch), or completely unmentioned previously (indeterminate), and examined how these …

Black And White Health Disparities: Racial Bias In American Healthcare, Yasmeen Almomani

Bridges: An Undergraduate Journal of Contemporary Connections

This paper explores the historical implications of race in American society that have led to implicit racism in the healthcare system. Racial bias in healthcare against Black people is a factor in the health disparities between Black and white people in America, such as the gap in life expectancy, infant death, and maternal mortality. Black people are more likely to report racial discrimination from healthcare providers, which is a reason for the decreased quality of care received. The past justifications of slavery, the Tuskegee syphilis study, and the medical experimentations on Black women are horrifying but were considered acceptable in …

The Nature Of Informal Roles In Interdependent Sport Teams, Jeemin Kim

Theses and Dissertations (Comprehensive)

The degree to which athletes understand and execute their formal role responsibilities (i.e., prescribed by coaches) is important for individual and group functioning (Eys, Schinke, Surya, & Benson, 2014). Recent literature suggested that informal roles can emerge within sport teams more naturally without coaches’ explicit assignments (e.g., team comedians, distracters), and have significant influences on team functioning (Cope, Eys, Beauchamp, Schinke, & Bosselut, 2011). This doctoral dissertation examined the nature of informal roles within interdependent sport teams, focusing on their antecedents and outcomes. Three separate projects were conducted. Project One examined athletes’ personality in the big five dimensions (McCrae & …

Spatial Memory And Executive Functioning In The Goto-Kakizaki Rat Model Of Diabetes, Lorielle Dietze

Theses and Dissertations (Comprehensive)

Type 2 diabetes mellitus is a disease that adversely affects cognitive function in areas extending to memory and executive functioning. The Goto-Kakizaki (GK) rat provides a model of type 2 diabetes that can illustrate the mechanisms by which this disease works. The present study compared hyperglycaemic GK rats and age-matched Wistar rats in the Morris water maze to assess spatial memory, and in a perceptual attentional set-shifting task to assess putative prefrontal-dependent executive functioning. Results showed there was no difference in path length during training trials, however, GK and Wistar rats differed in the path length travelled in the target …

What Makes An Image Memorable? Effects Of Encoding On The Mechanism Of Recognition, Asiya Gul

Theses and Dissertations (Comprehensive)

Memory is undoubtedly one of the most important processes of human cognition. A long line of research suggests that recognition relies on the assessment of two explicit memory phenomena: familiarity and recollection. Researchers who support the Dual Process Signal Detection (DPSD) model of recognition memory link the FN400 component (a negative ERP deflection peaking around 400 ms at frontal electrodes) with familiarity; however, it is currently unclear whether the FN400 reflects familiarity or implicit memory. Three event-related potentials (ERP) studies were conducted to determine whether implicit memory plays a role in setting up encoding strategies, and how these encoding strategies …

Fall Reading Week: Exploring The Effects On Student Well-Being, Roobina Medhizadah

Theses and Dissertations (Comprehensive)

Mental health is a concerning issue in post-secondary institutions across Ontario. Post-secondary students are challenged with many stressors such as time management and living independently for the first time (Wagner & Rhee, 2013). In an attempt to help students, maintain or improve their mental health, universities across Ontario have implemented fall reading week, a mid-semester break (Poole et al., 2017). Previous studies (Cramer & Pschibul, 2017; Poole et al., 2017) provided mixed results in whether fall reading week positively influences student mental health and well-being. To date, few studies have explored the influence of fall reading week on student health …

“This Is My Little World…”: Navigating The Group Exercise Experience Of Stay-Fit Members, Olivia Jones

Theses and Dissertations (Comprehensive)

Objective

Cancer is the leading cause of death in Canada, with one in two Canadians expected to develop cancer over their lifetime (Canadian Cancer Society, 2019). Exercise is reportedly a safe therapy to help ease the common side effects of cancer and its treatments (Schmitz et al., 2010). Past research has shown the benefits of group exercise while in treatment for cancer, but there is a dearth of research regarding the impact of long-term group exercise programming for cancer survivors. This phenomenological study explored the lived experiences of group exercise participation for individuals who previously had cancer and were enrolled …

Exploring Psychological Readiness To Return To Sport After Injury, Scott Donald

Theses and Dissertations (Comprehensive)

Athletes are often cleared to return to sport with little emphasis on psychological readiness in relation to physical readiness. This is important because athletes who are not psychologically ready to return to sport (RTS), despite being physically cleared, may lack motivation to compete and lack confidence in their abilities (Podlog, Banham, Wadey, & Hannon, 2015), drop out of sport, fear re-injury (Ardern et al., 2014), worry about future performance (Podlog & Eklund, 2006), experience anxiety and feel depressed (Tracey, 2003) or incur further injury (McCullough et al., 2012). Remarkably, there is no definition of psychological readiness consistently used in the …

Yardwork: A Biography Of An Urban Place By Daniel Coleman, Vivian M. Hansen

The Goose

Review of Daniel Coleman's Yardwork: A Biography of an Urban Place.

Exploring The Relationship Between Group Cohesion And Compassion In Varsity Athletes, Theo Chu

Theses and Dissertations (Comprehensive)

Compassion is a prosocial behaviour characterized by kindness and a non-judgmental attitude to reduce one’s suffering. Typically, it is thought of as a behaviour we express outwardly to others, but compassion can also be directed internally toward ourselves. This is known as self-compassion. The benefits of having compassion for other people have been largely studied in employment settings and everyday life behaviours. Moreover, research has shown self-compassion is also related to many positive outcomes. Compared to compassion for others, self-compassion has been studied in sport, however it is still in its infancy. Although research has demonstrated the importance of both …

An Evaluation Of Older Adults’ Perceptions Of Psychological Well-Being When Participating In Community Centre Programs, Kayla Rellinger

Theses and Dissertations (Comprehensive)

Multi-purpose organizations, such as community centres, provide opportunities for individuals to participate in various physical and social activities. Although, it has been well established that community centres provide the opportunity and environment to promote health behaviour changes among older adults (Jones et al., 2013; Stewart, 1997; Wallace et al., 1998), there is a dearth of research differentiating between physically active and non-active community centre programming. The purpose of the current study was to evaluate whether participating in community centre programming influenced four key measures of perceived psychological well-being, as well as, to evaluate whether the perceived psychological well-being of community …

An Examination Of Imagined Contexts: The Unreliability Of Context-Dependent Memory Effects In Recall, Caitlin J. I. Tozios

Theses and Dissertations (Comprehensive)

It is generally accepted that the environmental context present during memory encoding serves as an effective cue for recall if reinstated during retrieval. Participants who perform a free recall test in the same context as that during which they learned a set of words, often remember more words than participants who experience a context mismatch from encoding to retrieval. This is referred to as the context-dependent memory effect and forgetting due to a change in context is referred to as context-dependent forgetting. Recent evidence suggests that contexts need not always be physical but can be mentally generated or imagined and …

The 2d:4d Ratio, Handedness, And Sex Across The Age Span, Helen A M Protopapas Ms.

Theses and Dissertations (Comprehensive)

The ratio of the difference between the 2nd and 4th digits of the hand (2D:4D ratio) has been demonstrated to be an indirect indicator of prenatal testosterone levels. Prenatal testosterone has been found to play a role in brain development in utero, and thus may influence lateral asymmetries, such as handedness. Consequently, one of the aims of the current study was to examine relationships between the 2D:4D ratio, hand preference, and hand performance with the factors of sex (males and females), handedness (right handers and left handers), and age considered. A total of 104 participants were tested, 90 right handers …

Youth Athlete Leaders' Use Of Transformational Behaviours And Relations To Trust In The Leader And Sport Outcomes, Amy M. Cubitt, Mark Eys

Theses and Dissertations (Comprehensive)

Leadership is one of the most crucial factors determining whether a group succeeds or fails (Bass, 1990). Furthermore, leaders displaying transformational behaviours are thought to lift followers to higher levels of motivation to get them to perform beyond expectations (Bass, 1985), and they tend to have followers who are more committed and satisfied (Bass & Riggio, 2006). Another outcome of transformational leadership in organizations is that followers are more willing to trust leaders who show care and concern for the follower (Dirks & Ferrin, 2002). The purpose of the present study was to determine if the use of full range …

An Exploration Of The Wheel-Induced Feeding-Suppression, Stephen Benjamin Peckham

Theses and Dissertations (Comprehensive)

Anorexia nervosa is an enigmatic human condition typified by food-restriction that is often accompanied by extensive exercise. This has been modeled in rats in the wheel-induced feeding-suppression (WIFS) model. In this model, animals are given access to a running-wheel, which induces a volitional drop in food-consumption. Short periods of wheel access have induced a feeding-suppression which is effectively reversed by chlorpromazine administration (Adams et al., 2009). Recent attempts at replicating Adams et al.’s (2009) feeding-suppression have, however, been unsuccessful (Peckham et al., 2013). These attempts raised questions as to whether or not the existing methodology is most effective at suppressing …

Influence Of Planning Resources On Gait Control In Parkinson’S Disease, Frederico P. Faria

Theses and Dissertations (Comprehensive)

Movement disturbances in individuals with Parkinson’s disease (PD) have been associated with difficulties to plan complex actions. Performance of simple and complex actions overloads resources for individuals with Parkinson’s disease (PD). However, it is unclear if central resources required to plan gait adjustments while walking exacerbate gait disturbances of patients with PD. More specifically, it is unclear how gait impairments, sensory processing, and the dopaminergic system influence the load on processing resources (e.g. cognitive load) during the planning of step modifications. In order to investigate the relative influence of these factors on cognitive load and its impact on gait control, …

Time, Perspectives, Verbs, And Imagining Events, Jeffrey P. Hong

Theses and Dissertations (Comprehensive)

During the processing of verbs, readers form internal representations of the events described by those verbs. Two key elements in the construction of event representations are temporal information, given by the verbs that describe the represented events, and the visual perspective from which the events are represented. The current study is composed of two experiments aimed at examining the roles these two factors play in event representation. Specifically, the study aimed to determine how temporal information and visual perspective are represented during event imagination.

Experiment 1 investigated the role of temporal information associated with verbs, given by grammatical aspect (GA) …

A Bittersweet Investigation Of Availability And Nutritive Value As Determinants Of Volitional Sucrose Consumption, Milan D. Valyear

Theses and Dissertations (Comprehensive)

Rats given ~24 h access to a 4% sucrose solution every 3^rd day (E3DA) consume about 100 g more solution than rats with continuous, everyday access (EDA). Under the same EDA-E3DA conditions rats will consume similar amounts of a more concentrated 8 or 16% sucrose solutions (Eikelboom, Hewitt, & Adams, Unpublished). It maybe that with these more concentrated solutions rats hit a satiety limit that prevents a difference between EDA and E3DA consumption from being evident. Experiment 1 was conducted to investigate the effect of adding quinine to 4% and 8% sucrose solutions with the intention of reducing consumption …

The Practitioner's Corner: An Exploration Of Municipal Active Living Charter Development And Advocacy, M. Blair Evans, Alex J. Benson, Terry L. Mitchell, Jennifer Robertson-Wilson, Mark Eys

Kinesiology and Physical Education Faculty Publications

Background: Numerous municipal active living-­‐related charters have been adopted to promote physical activity in Canada throughout the past decade. Despite this trend, there are few published critical examinations of the process through which charters are developed and used.

Purpose: Thus, the purpose of this study was to establish greater understanding of active living charter development and advocacy.

Methods: Semi-­‐structured interviews were conducted with eight primary contributors to different active living-­‐related charters across Ontario, Canada. Interview questions explored participants’ experiences developing and advocating for an active living charter. Interviews were analyzed using open, axial, and selective coding.

Results and Conclusions: Participants …

Food Systems: Community-Shared Agriculture, A Means Of Empowerment And Social Vitality, Godwin Samuel Ashiabi

Theses and Dissertations (Comprehensive)

In this thesis I focused on the Community Shared Agriculture (CSA) as an alternative form of farming to industrialized agriculture. CSA connects the growers of food directly with the people who eat it, in a way where everyone shares the benefits and risks involved in agriculture. The Huron Community Garden in Goderich is the setting that was selected for this study because of its five-year history as a form of CSA. A naturalistic participant-observation mode of enquiry was employed. As a participant-observer, I was involved in all activities of the Garden—weeding, tilling of the ground, transplanting of seedlings, watering of …

Evidence For Common Coding Of Temporal And Nontemporal Information In Pigeons, Stephen Bridson

Theses and Dissertations (Comprehensive)

Two experiments found evidence that pigeons commonly code temporal and visual samples that are associated with the same comparisons in many-to-one matching. In Experiment 1, pigeons were trained to match temporal (2-sec and 8-sec keylight durations) and color (red and green) samples to line tilt comparisons (vertical and horizontal). Similar rates of forgetting were found for all samples. Furthermore, retention of sample information appeared more similar for samples which shared common comparisons than those that did not. In Experiment 2, pigeons learned new comparison (circle and triangle) associations with either temporal or visual samples from Experiment 1. When tested on …

Stimulus Control Exerted By Remember Cues Over Processing In Pigeons’ Short-Term Memory, Patricia E. Hernandez Torres

Theses and Dissertations (Comprehensive)

The aim of the present research was to provide further evidence regarding the role of remember cues on pigeon short-term memory. The first two experiments were conducted to determine whether, using a single cuing procedure, control over delayed matching-to-sample (DMTS) performance could be demonstrated by establishing a no cue condition as an implicit cue to forget. In Experiment 1, subjects were provided with training in a procedure where both forget cue (F) and no cues indicated the omission of the comparison stimuli at the end of the delay interval. In Experiment 2, naive subjects were trained with remember (R) and …

Pigeon Short-Term Memory: The Effects Of Intertrial Interval Duration And Illumination In A Successive Delayed Matching-To-Sample Procedure, Vic Grossi

Theses and Dissertations (Comprehensive)

The aim of this research was to examine the effects of illumination and intertrial interval duration on pigeon short-term memory, using a successive matching-to-sample procedure. In phrase one the retention interval was manipulated individually for each bird. During the second phase, a correction procedure was implemented in order to reduce the number of responses made to non-match comparison stimuli. In the third phase, the birds were returned to a common baseline, in order to observe what effect elimination of the correction procedure had on the bird’s performance. In the final phase of the research, after achieving stable performance in the …