Psychology

Development and Psychometric Evaluation of a Short Measure of Personal Intelligence

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Creator (cre): van Rens, Samantha M, Thesis advisor (ths): Parker, James D.A., Thesis advisor (ths): Summerfeldt, Laura J., Degree committee member (dgc): Saklofske, Donald, Degree granting institution (dgg): Trent University
Abstract:

The Multidimensional Inventory of Personal Intelligence (MIPI) was designed to measure three related dimensions of the personal intelligence (PI) construct: emotional intelligence (EI), social intelligence (SI), and motivational intelligence (MI). The MIPI has psychometric properties and a theoretical structure that improves on the shortcomings of existing trait EI measures. The aim of the first study was to create and validate a shortened form (MIPI- Short) that maintains the same factorial structure of the original MIPI. The purpose of the second study was to validate the new scale with measures of conceptually similar constructs (e.g., emotional intelligence, Alexithymia) with various measurement methodologies (self-report, observer-report, and performance-based). Results from Study 1 found that the MIPI-Short had good factorial structure in two independent samples, as well as adequate internal reliability, and good incremental validity. The results of Study 2 demonstrated that the MIPI-Short had good construct validity as it generally related as expected with measures of EI and Alexithymia. The findings of both studies provide evidence for the validity of the MIPI-Short as a brief measure of Personal Intelligence. Directions for further research are emphasized, as the validation process is on-going for any assessment tool.

Author Keywords: Emotional Intelligence, Personal Intelligence, Socio-Emotional Competencies

2024

Challenging Ageism and Supporting Age-Based Equity through an Intergenerational University Classroom: Proposing a Revised Model of Age-Consciousness

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Creator (cre): Wells, Tabytha, Thesis advisor (ths): Russell, Elizabeth, Degree committee member (dgc): Skinner, Mark W, Degree committee member (dgc): O'Hagan, Fergal, Degree granting institution (dgg): Trent University
Abstract:

Ageism is pervasive and harmful, creating an urgent need to understand how ageist attitudes can be improved. Building on the novel age-conscious student concept, this thesis explored the outcomes of a pilot intergenerational classroom, aimed at reducing ageism, that integrated 13 older community participants into a university-based psychology of aging course alongside 60 younger students. Following course completion, 31 individual interviews (13 community participants,18 students) and one focus group (4 students) were conducted to assess the impact of intergenerational connectivity on ageism and age-consciousness. An iterative collaborative qualitative analysis revealed three major themes regarding participants' experiences with ageism and age-consciousness in the intergenerational classroom: (1) heightened knowledge of ageism, (2) transformed attitudes toward aging and youth, and (3) enhanced personal connection with aging. From these findings, a revised model of age-consciousness is presented, describing three integrative factors that promote positive attitudes toward aging and youth.

Author Keywords: age-conscious student, age-consciousness, ageism, ageism intervention, intergenerational, qualitative

2026

When Parents Phub: Investigating its Relationship with Children's Digital and Problem Behaviours

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Creator (cre): Vandendort, Tiana, Thesis advisor (ths): Liu, Mowei, Degree committee member (dgc): Blair, Karen L, Degree committee member (dgc): Liu, Pan, Degree granting institution (dgg): Trent University
Abstract:

In today's digital era, smartphone use is having a profound effect on family life. There is growing concern about parental phubbing, which occurs when parents ignore their children in favour of using their phones. This study examined how parental phubbing was associated with children's problematic media use (PMU), and problem behaviours (internalizing, externalizing,attention) during middle childhood. The role of the parent-child relationship, measured by closeness and conflict, was also explored given its well-established influence on child development. Participants included 99 parents/guardians of 6-8-year-olds and 87 parents/guardians of 9-12-year-olds. Data on all variables were collected through online surveys. Across both groups, phubbing was associated with children's PMU. Among the 6-8-year-old's, phubbing was also linked to internalizing and externalizing problems. In this age group, parent-child closeness buffered phubbing effects while conflict mediated the relationship between phubbing and children's behaviour. These findings enhance our understanding of parental phubbing within Canadian family contexts.

Author Keywords: Middle Childhood, Parent-Child Relationship, Phubbing, Problem Behaviours, Problematic media use

2025

Psychometric Properties of a Short Coping Measure: An Investigation of the Coping Inventory for Stressful Situations – Short Form (CISS-SF)

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Creator (cre): Van Elswyk, Amy, Thesis advisor (ths): Parker, James D. A., Thesis advisor (ths): Summerfeldt, Laura J., Degree committee member (dgc): Parker, James D. A., Degree committee member (dgc): Summerfeldt, Laura J., Degree granting institution (dgg): Trent University
Abstract:

Objective: The Coping Inventory for Stressful Situations (CISS) is a widely used measure of trait coping that was developed to assess three basic coping styles: task-oriented, emotion-oriented, and avoidance-oriented coping. This thesis examined the psychometric properties of a short form for the CISS (CISS-SF). Method: Data from a large longitudinal sample of adults were used to conduct analyses testing the measure's factor structure, internal and test-retest reliabilities, and construct validity with respect to mental health outcomes. Results: The 3-factor model provided acceptable fit to the sample data. Internal reliabilities for the scales were acceptable across multiple administrations (by gender and age), while 1 and 2-year test-retest correlations were also consistent with what would be expected for stable coping style constructs. Relationships were found to be consistent with previous research on coping. Conclusion: Overall, the results suggest that the CISS-SF is a valid and reliable brief multi-dimensional measure of coping styles.

Author Keywords: basic personality, coping, coping styles, mental health, psychometrics

2025

Widening the Lens: Feminist Learning in Counselling and Psychotherapy

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Creator (cre): Trefzger Clarke, Lisa Joyce Helena, Thesis advisor (ths): Pendleton Jimenez, Karleen, Degree committee member (dgc): Boucher, Lisa, Degree committee member (dgc): Handlarski, Denise, Degree committee member (dgc): Cole, Jenn, Degree committee member (dgc): Arraiz Matute, Alexandra, Degree granting institution (dgg): Trent University
Abstract:

This study examines the formal, informal, and non-formal learning experiences offeminist-identified counsellors and psychotherapists working within the Violence Against Women (VAW) and Gender-Based Violence (GBV) sector of community- based social services in Ontario, Canada. Using critical, feminist polyethnography and intersectional and feminist theories, this study discusses the participants' and researcher's experiences in the field. The participants' narratives contribute to the understanding of intersectional feminist pedagogies in counselling and psychotherapy practices and spaces. Additionally, the study offers recommendations for post- secondary programs, wise practice approaches to intersectional clinical supervision, and a framework for community of practice models of peer supervision.

Author Keywords: adult learning, feminism, feminist theory, intersectional theory, psychotherapy, social work

2025

Describing Symptom Heterogeneity in Obsessive-Compulsive Disorder: Relationships Between and Stability Within the Overt Symptom and Core Dimensions Models

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Creator (cre): Till, Jordan, Thesis advisor (ths): Summerfeldt, Laura J., Degree committee member (dgc): Parker, James D. A., Degree committee member (dgc): Latif, Shehreen, Degree committee member (dgc): Humphreys, Terry P., Degree granting institution (dgg): Trent University
Abstract:

Two dimension-based models have emerged that capture the high symptom heterogeneity observed in obsessive-compulsive disorder (OCD)—one grouping symptoms by their overt presentation, the other identifying core dimensions of underlying symptom motivations. This paper presents two studies that explore (1) the relationship between these two models, and (2) the stability of the models and dimensions they each represent. Study 1 found that the core dimension motives jointly predicted overall OCD symptom severity, and that each core dimension further predicted unique nonoverlapping overt symptom dimensions. Study 2 demonstrated that despite high instances of item-level symptom change, both models and their respective dimensions were longitudinally stable, with exception to overt symptoms relating to harm/injury/bad luck. Both studies support further consideration of these models as clinical resources and support the candidacy of the core dimensions as endophenotypes for OCD. Results, limitations, clinical implications, and future directions are discussed.

Author Keywords: Core Dimensions, Endophenotype, Obsessive-Compulsive Disorder, Overt Symptoms, Stability, Symptom Models

2024

Exploring the Impact of Acute Stress on Previously Acquired Contextual Fear Memory

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Creator (cre): Thiyagarajah, Javishaa, Thesis advisor (ths): Fournier, Neil, Degree committee member (dgc): Lehmann, Hugo, Degree committee member (dgc): Marks, Wendie, Degree granting institution (dgg): Trent University
Abstract:

Stress can significantly affect neurobiological processes crucial for learning and memory. While repeated stress enhances fear memory, it impairs memory retrieval. In most studies, however, stress exposure typically preceded fear and extinction learning. Thus, the impact of previously acquired memories formed before exposure to stress is not well understood. The goal of this thesis is to examine how acute stress impacts the ability to retrieve previously acquired fear memories. The results showed that stress impaired recall of recent fear memories, but stress seven days after conditioning did not affect memory retrieval. Analysis of c-Fos expression revealed increased neuronal activity in the medial prefrontal cortex (mPFC) of rats exposed to stress. Additionally, stress exposure decreased mRNA expression of Reelin, a glycoprotein in the mPFC. Notably, administering recombinant Reelin improved fear memory recall. These findings highlight potential pathways for research and interventions on stress-induced memory impairments.

Author Keywords: c-Fos expression, Fear memory, Medial prefrontal cortex, Memory retrieval, Reelin, Stress

2025

Bridging Behaviour and Mechanism in Relief Learning in Rats: A Combined Behavioural, Molecular, and Chemogenetic Approach

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Creator (cre): Thivierge, Lexi, Thesis advisor (ths): Fournier, Neil M., Degree committee member (dgc): Lehmann, Hugo, Degree committee member (dgc): Melvin, Neal, Degree granting institution (dgg): Trent University
Abstract:

Maladaptive fear can develop when nonthreatening stimuli are misinterpreted as dangerous. While fear extinction has been extensively studied, organisms can also learn safety through relief learning, in which cues signalling the termination of an aversive event acquire positive value. Although the medial prefrontal cortex (mPFC) is implicated in regulating responses to threat and safety cues, its role in relief learning remains unclear. In Experiment 1, I validated a relief conditioning paradigm in rats and demonstrated that relief-conditioned animals froze significantly less than fear-conditioned animals during retention. Experiment 2 revealed that relief learning selectively activated the prelimbic cortex (PrL). In Experiment 3, chemogenetic inhibition of the PrL reduced freezing across tones, supporting a causal role in relief expression. Experiment 4 demonstrated that extended training produced more stable and pronounced reductions in freezing than a one-day protocol. Together, these findings identify PrL circuits as key contributors to relief learning.Keywords: Maladaptive fear, relief learning, fear conditioning, medial prefrontal cortex (mPFC), fear extinction, rat model, behavioural freezing, Fos expression, neural circuitry, conditioned stimuli, aversive stimuli, neuroimaging.

Author Keywords: Conditioned stimuli, Fear condtioning, Maladaptive fear, Medial prefrontal cortex, Neural circuitry, Relief learning

2026

Freezing in Parkinson's Disease: A Reaching Study

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Creator (cre): Stevenson, Jennifer, Thesis advisor (ths): Brown, Liana E, Degree committee member (dgc): Peters, Kevin R, Degree committee member (dgc): Forman, Davis, Degree granting institution (dgg): Trent University
Abstract:

Freezing of gait is a debilitating symptom affecting individuals with Parkinson's disease. Emerging evidence suggests freezing may represent a global motor control deficit beyond gait. We investigated freezing episodes in the upper limbs using spatially-constrained reaching tasks known to elicit freezing of gait. Fourteen people with Parkinson's disease and 13 controls completed reaching tasks under three spatial conditions with varying backgrounds. The tunnel condition produced the greatest kinematic disruptions. Despite people with Parkinson's disease showing significantly longer movement times and slower speeds, they were less accurate in their movements, suggesting observed differences reflect genuine motor control deficits rather than speed-accuracy trade-offs. The tunnel's narrow spatial constraints challenge the motor system's ability to maintain coordinated movement trajectories, with people with Parkinson's disease exhibiting increased trajectory variability. These findings demonstrate that freezing-like episodes extend beyond gait, supporting the hypothesis that freezing represents a global motor phenomenon in Parkinson's disease.

Author Keywords: freezing of gait, motor control, Parkinson's disease, reaching, upper limbs

2026

How Spotting With Touch Affects Skill Performance and Self Confidence in Gymnasts

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Creator (cre): Sorzano, Samantha, Thesis advisor (ths): Brown, Liana, Degree committee member (dgc): Peters, Kevin, Degree committee member (dgc): Bernardi Bagesteiro, Leia, Degree committee member (dgc): Humphreys, Terry, Degree granting institution (dgg): Trent University
Abstract:

Positive coaching techniques are gaining prominence in the sport of Gymnastics. Coaches are focusing on positive reinforcement, encouragement, and constructive feedback rather than relying solely on traditional, more authoritarian coaching methods. Furthermore, technology is being used to enhance coach-athlete relationships. Video analysis tools and performance tracking software allow for more detailed feedback and communication between coaches and gymnasts. Previous research has shown that sensory feedback, and physical cues and guidance impact both motor learning and motor skill performance. Spotting is a form of physical guidance (touch) that may be used by gymnastics coaches during both the learning phase of a skill and during performance, even after mastery. This research has examined whether and how spotting with touch influences the athlete's skill performance and confidence. The current study explored how spotting affects both skill performance and self-confidence of participants as they performed a basic skill (a backward jump onto a specified target) they have already mastered. We asked Intermediate-level gymnasts to perform a backward jump from height under two levels of landing difficulty, while being spotted with and without touch. Their confidence was measured in each condition using a brief survey. The timing, accuracy and precision of their landing was measured from video recordings of their performance. We evaluated the relationship between touch and skill performance to determine if it is affected by athlete self-confidence. It was hypothesized that physical guidance in the form of spot with touch would improve the accuracy and precision of the jump landing and that athletes would report higher levels of self-confidence in the touch versus no touch condition. We found no significant differences in skill performance and landing stability as assessed by rate of force development and peak force. We found that participants reported significantly higher levels of self-confidence when receiving spot with touch in the easy landing condition.

Author Keywords: gymnastics, physical guidance, self-confidence, skill performance, spotting, touch

2024