Our Team

Principal Investigator                                                      Post Doctoral Fellow

Dr. Sherry Stewart

Dr. Sherry Stewart

MAAC Lab Director

Sherry H. Stewart, Ph.D., is a Tier 1 Canada Research Chair in Addictions and Mental Health and a professor in the Departments of Psychiatry, Psychology and Neuroscience, and Community Health and Epidemiology at Dalhousie University, as well as a licensed clinical psychologist in the province of Nova Scotia. Dr. Stewart is a recently inducted Fellow in the Royal Society of Canada. She is well known for her research on psychological factors contributing to alcohol abuse, pathological gambling, and the comorbidity of emotional and addictive disorders. Dr. Stewart is a member of the Scientific Advisory to the Canadian Centre on Substance Abuse, and Editor-in-Chief for the Journal of Gambling Issues. Dr. Stewart founded the Centre for Addiction Research at Dalhousie (CARD), a virtual centre at Dalhousie fostering collaborations among faculty members conducting research on addiction, and is on the steering committee of the Quebec-Maritimes node of the CIHR-funded Canadian Research Initiative in Substance Misuse (CRISM). She is Co-Director of Research in the Department of Psychiatry, and co-directs the new MSc program in psychiatry research at Dalhousie. Dr. Stewart receives funding from several research agencies including the Social Sciences and Humanities Research Council (SSHRC), the Canadian Institutes of Health Research (CIHR), the Nova Scotia Health Research Foundation (NSHRF), the National Center for Responsible Gambling (NCRG), and the Manitoba Gambling Research Program (MGRP).

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Mohammed Al-Hamdani

Mohammed Al-Hamdani

MAAC Lab Post Doctoral Fellow

I completed both my BSc. in Health Promotion (with distinction) and CA+HME accredited Master of Health Administration at Dalhousie University. I also graduated with a PhD in I/O Psychology from Saint Mary’s University. I have years of experience in addiction research and tobacco control management. My main research interests are focused on two areas: 1) the effect of messaging and cues on addictions within the realm of brand imagery, health warnings, cue sensitivity and cross priming, and 2) the effect of comprehensive policies on public health. I am currently a Mitacs Elevate Post-Doctoral Fellow at Dalhousie University and the Lung Association of Nova Scotia. I continue to be active in addiction policy and have affiliations with both Smoke-Free Nova Scotia and the Lung Association of Nova Scotia.
Sample Awards: 2013-2014 Leadership Excellence Award – Cancer Care Nova Scotia
2014-2016 Scotia Scholar's Award (Doctoral)-NSHRF
2014-2017 Joseph-Armand Bombardier CGS Doctoral Scholarships - SSHRC
2018-ongoing Mitacs Elevate Post Doctoral Fellowship - Mitacs
Sample Publications: Al-Hamdani, M. (2013). The effect of cigarette plain packaging on individuals' health warning recall. Healthcare Policy, 8(3), 68-77. Al-Hamdani, M. (2014). The case for stringent alcohol warning labels: lessons from the tobacco control experience. Journal of Public Health Policy, 35(1), 65-74. Al-Hamdani, M., & Smith, S. (2015). Alcohol warning label perceptions: Emerging evidence for alcohol policy. Canadian Journal of Public Health, 106(6), e395-e400. Al-Hamdani, M., & Smith, S. (2016). Food product design: emerging evidence for food policy. International Journal of Food Sciences and Nutrition, 1-7. Al-Hamdani, M., & Smith, S. (2017). Alcohol warning label perceptions: do warning sizes and plain packaging matter? Journal of Studies on Alcohol and Drugs, 78(1), 79-87


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Pablo Romero

Pablo Romero

Visiting Post Doctoral Fellowship from the University of Malaga

I completed both my BSc. in Psychology and Master in Clinical and Health Psychology at the University of Malaga (Spain). After that, I got my Doctorate in Clinical Psychology Hospital of Jaen (Spain), and my Ph.D. also at the University of Malaga (with distinction and European mention). Finally, I got a Master in Neurosciences at the University of Cadiz (Spain). I have more than 10 years of clinical experience with patients with addictions, mood, anxiety and psychotic disorders in both Spanish Public Health Services and my own private practice in both group and individual formats. My research interests go from cognitive-behavioural processes involved in psychological disorders from both transdiagnostic and disorder-specific approaches, to the interplay of biological and psychological variables in the development, maintenance and treatment of mental disorders, but also the implementation of Internet-based psychological therapies.
Sample Awards: Grant for stays in clinical excellence centre (University of Málaga)
Río Hortega Fellowship (Health Institute Carlos III)
Grant for stays in clinical excellence centres (National Association of Clinical Psychologists and Residents)
Sample Publications: Romero-Sanchiz, P., Nogueira-Arjona, R., Godoy-Avila, A., Gavino-Lazaro, A., & Freeston, M. H. (2017). Differences and similarities between obsessions, worries and illness intrusions in a clinical sample. Clinical Psychology and Psychotherapy, 1-10.https://doi.org/10.1002/cpp.2107.
Romero-Sanchiz, P., Nogueira-Arjona, R., Godoy-Avila, A., Gavino-Lazaro, A., & Freeston, M. H. (2017). Assessing transdiagnostic intrusive thoughts: Factor structure, reliability and validity of a revised version of the Cognitive Intrusions Questionnaire in a Spanish sample. Personality and Individual Differences, 114, 181–186. https://doi.org/10.1016/j.paid.2017.04.008.
Romero-Sanchiz, P., Nogueira-Arjona, R., García-Ruiz, A., Luciano, J.V., Garcia-Campayo, J., Gili, M., Botella, C., Baños, R., Castro, A., Lopez-del-Hoyo, Y., PerezAra, M.A., Modrego-Alarcon, M., Mayoral-Cleríes, F. (2017). Economic evaluation of a guided and unguided internet-based CBT intervention for major depression: Results from a multi-center, three-armed randomized controlled trial conducted in primary care. PloS one, 12(2),e0172741. https://doi.org/10.1371/journal.pone.0172741.
Romero, P.& Gavino, A. (2009) Tratando... Trastorno de Ansiedad Generalizada. Madrid: Pirámide.ISBN 9788436822953.


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Raquel Nogueira

Raquel Nogueira

MAAC Lab Post Doctoral Fellow

I completed both my BSc. in Psychology and Master in Clinical and Health Psychology at the University of Malaga (Spain). I got my Ph.D. in Clinical Psychology with distinction and European mention. I have held lecturing positions in psychological assessment, diagnosis and psychopathology at the University of Malaga. My research interests are focused on the impact of comorbidity in the efficacy of psychological treatments, the effectiveness of resilience programs in young populations, and the implementation of web-based psychological therapies. I have experience in the study of the relationship between anxiety and mood symptoms, psychosocial and physiological variables in children and adolescents. Also, I am particularly interested in single case experimental designs and data analysis.
Sample Awards: Doctoral Research and Teaching Fellowship (Junta de Andalucía Excellence Program)
Postdoctoral Research and Teaching Fellowship (Junta de Andalucía Excellence Program)
Grant for stays in clinical excellence centres (National Association of Clinical Psychologists and Residents)
Grant for postdoctoral stays in clinical and research excellence centres (University of Málaga)
Grant for doctoral stays in research excellence centres (Junta de Andalucía)
Sample Publications: Nogueira-Arjona, R.,Santacana, M., Montoro, M., Rosado, S., Guillamat, R., Vallès, V. & Fullana, M.A. (2017). Sudden Gains in Exposure-focused Cognitive-Behavioral Group Therapy for Panic Disorder.http://dx.doi.org/10.1002/cpp.2093
Romero-Sanchiz, P., Nogueira-Arjona, R., García-Ruiz, A., Luciano, J.V., Garcia-Campayo, J., Gili, M., Botella, C., Baños, R., Castro, A., Lopez-del-Hoyo, Y., PerezAra, M.A., Modrego-Alarcon, M., Mayoral-Cleríes, F. (2017). Economic evaluation of a guided and unguided internet-based CBT intervention for major depression: Results from a multi-center, three-armed randomized controlled trial conducted in primary care. PloS one, 12(2),e0172741. https://doi.org/10.1371/journal.pone.0172741
Gavino, A., Nogueira, R., Pérez-Costillas, L., Godoy, A. (2017). Psychometric Properties of the Frost Multidimensional Perfectionism Scale in Spanish Children and Adolescents. Assessment. https://doi.org/10.1177/1073191117740204
Gavino, A., Nogueira, R.& Godoy, A. (2014). Manual para el tratamiento psicológico del Trastorno Obsesivo-Compulsivo en niños y adolescentes. Madrid: Pirámide. Romero, P.& Gavino, A. (2009) Tratando... Trastorno de Ansiedad Generalizada. Madrid: Pirámide.ISBN 9788436822953.


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Lab Staff

Jennifer Swansburg

Jennifer Swansburg

MAAC Lab Manager- Alcohol and Anxiety Projects

I returned to school, completing a BSc at Dalhousie University (2010). I started working with the Stewart lab in 2011 and have had the opportunity to work on and support a number of research projects involving Dr. Stewart’s lab members and collaborators. I am interested in the impact efficacious treatment can have on youth and adults suffering with mental health and addictions concerns.


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Kyle McKee

Kyle McKee

MAAC Lab Manager - CUSP Trial

My undergraduate work was done at the University of New Brunswick (BA in psychology/anthropology 2010; BSc in biological psychology 2015). I received my MSc in Neuroscience from McGill University in 2018, under the supervision of Dr. Suzanne King and Dr. Mallar Chakravarty. My graduate research focused on how stress experienced by pregnant women impacts the structural brain development of children. Overall, I feel that I have obtained a unique blend of skills and interests, on top of years of highly relevant research experience. My primary role in the MAAC lab will be to help oversee the Canadian Underage Substance Use Prevention (CUSP) Trial.

Pam Collins

Pam Collins

MAAC Lab Manager- Gambling Projects

I completed my undergraduate studies in May 1999 at Dalhousie University, receiving a first class honours degree in Psychology. Since graduation, I have been managing the Dalhousie Gambling Lab. I have had the privilege to be both a student and employee of Dr. Stewart's, and I love the variety and learning opportunities that my job affords me.


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Graduate Students

Noelle Strickland

Noelle Strickland

Ph.D. Student

I completed my Master's degree at Carleton University and I am in the first year of my PhD in Clinical Psychology. I am interested in how social anxiety and drinking motives influence alcohol use in adolescents and young adults. In future studies I aim to explore how context (e.g., alone, with friends) may change drinking behaviours for socially anxious young adults.
Awards: 2016/2017 Killam Predoctoral Scholarship-Level 2
2016/2017 Honorary Nova Scotia Graduate Scholar
2015/2016 Joseph Armand Bombardier Canada Graduate Scholarship - Master's
Publications: Howard, A. L., Strickland, N. J., Murray, D. W., Tamm, L., Swanson, J. M., Hinshaw, S. P., . . . Molina, B. S. G. (2016). Progression of impairment in adolescents with Attention-Deficit/Hyperactivity Disorder through the transition out of high school: Contributions of parent involvement and college attendance. Journal of Abnormal Psychology, 125(2), 233 – 247.


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Ioan Tiberiu Mahu

Ioan Tiberiu Mahu

Ph.D. Student

I graduated with first class honours in Psychology from McGill University in 2014, having been supervised by Dr. John Lydon and Dr. Robert Pihl. Outside of school, I worked as part of Dr. Patricia Conrod's research team as a clinical and logistical research assistant at the Université de Montréal's research hospital, Sainte-Justine. I will be starting my first year in the Clinical Psychology PhD program in fall 2015 under the supervision of Dr. Sherry Stewart. I am interested in the prevention and treatment of alcohol and cannabis misuse specifically, and substance use generally, within the context of high-risk personality traits and their maladaptive motives. Clinically, I am interested in addiction, trauma and anxiety. Broadly, I am interested in a variety of psychological topics, including social psychology, cognitive neuroscience and mental health initiatives.
Awards: 2015-2016 Frederick Banting and Charles Best Canada Graduate Scholarship - Master's
2015-2016 Scotia Scholar Master's Award
2015-2017 Nova Scotia Research and Innovation Graduate Scholarship - Master's
2015-2017 Fonds de Recherche Québec - Santé - Bourse de maîtrise
Publications: Mahu, I.T., Doucet, C., O’Leary-Barrett M. & Conrod, P. (in press). Can Cannabis Use be Prevented by Targeting Personality Risk in Schools? 24-Month Outcome of the Adventure Trial on Cannabis Use. Addiction.


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Ivy-Lee Kehayes

Ivy-Lee Kehayes

Ph.D. Student

I graduated from Dalhousie University in 2013 with first class honours in Psychology and am currently enrolled in the fifth year of my PhD in Clinical Psychology. I am interested in dyadic drinking broadly, and more specifically in how an individual's drinking behaviour and drinking motivations can influence another's drinking behaviour in a social context.
Awards: 2016-2019 Joseph-Armand Bombardier Doctoral Scholarship (SSHRC)
2016-2018 NSHRF Scotia Scholar Award (PhD)
2016-2017 Dalhousie President’s Award
2015-2018 Eliza Ritchie Scholarship
2014-2016 Killam Predoctoral Scholarship
2014-2015 D. O. Hebb Post-Graduate Prize
2014-2015 Canada Graduate Scholarship-Masters (SSHRC)
Publications: Kehayes, I-L., Hudson, A., Thompson, K., Wekerle, C., Stuart, H., Dobson, K., Krupa, T. and Stewart. S. (in press). The consequences of alcohol-involved sexual victimization in male and female college students. Accepted for publication in Canadian Journal of Community Mental Health March 2018.
Kehayes, I. L., Mackinnon, S. P., Sherry, S. B., Leonard, K. E., & Stewart, S. H. (2017). Similarity in romantic couples' drinking motivations and drinking behaviours. Substance Abuse, 38, 488-492.
Mackinnon, S. P., Kehayes, I. L., Clark, R., Sherry, S. B., & Stewart, S. H. (2014). Testing the Four-Factor Model of Personality Vulnerability to Alcohol Misuse: A Three-Wave, One-Year Longitudinal Study. Psychology of Addictive Behaviors, 28, 1000-12.


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Mandy Hagen

Mandy Hagen

Ph.D. Student

I completed my BSc in Psychology from Queen's University and began the Dalhousie Clinical Psychology program in 2018. My primary interests lie in the co-occurrence of substance use and mood disorders. I hope to focus my research on the underlying cognitive mechanisms of this co-occurrence, specifically examining coping, self-efficacy, and cognitive biases in alcohol use and depression.
Awards: 2018-2019 Nova Scotia Graduate Scholarship (Masters)
2018-2019 Joseph-Armand Bombardier CGS-M (SSHRC)
Publications:
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Sara Bartel

Sara Bartel

Ph.D. Student

I completed by BA Honours at the University of Saskatchewan and began the Dalhousie Clinical Psychology program in September of 2016. I am currently studying social influence and substance use. Specifically, I am interested in examining how members of social networks influence cannabis and alcohol use.
Awards: Durand Jacobs Award for best graduate student paper related to the psychology of addictive behaviors
2017-2019 Killam Predoctoral Scholarship (Level 2)
2017-2021 Nova Scotia Graduate Scholarship (Doctoral)
2016-2017 Killam Predoctoral Scholarship (Level 1)
2016-2017 Nova Scotia Graduate Scholarship (Masters)
2016-2017 Canadian Graduate Scholarship-Masters (CIHR)
Publications: Bartel, S. J., Sherry, S. B., Smith, M. M., Vidovic, V. V., & Stewart, S. H. (2018) Is anxiety sensitivity a risk factor for, or complication of, alcohol misuse? A meta-analysis. Personality and Indivdiual Differences, 135, 258-263
Bartel, S., Sherry, S., Molnar, D., Mushquash, A., Leonard, K., Flett, G. & Stewart, S. (2017). Heavy episodic drinking among romantic partners: Support for the partner influence hypothesis using a 3-Year longitudinal design. Addictive Behaviors, 69, 55-58.


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Colin Pridy

Colin Pridy

Ph.D. Student

I am a first-year student in the Clinical Ph.D. program. I completed a degree in music and psychology at Dalhousie in the early 2000s, followed by graduate work in music composition at the University of British Columbia. Now back at Dalhousie, my Ph.D. research will be focused on examining the effects of listening to music on treatment strategies for high anxiety sensitivity, supervised by Margo Watt and Sherry Stewart.
Awards: 2016-2017 Frederick Banting and Charles Best Canada Graduate Scholarship
2016-2018 Izaak Walton Killam Predoctoral Scholarship
2016-2017 Nova Scotia Health Research Foundation Scotia Scholars Award
2016-2018 Nova Scotia Research and Innovation Graduate Scholarship
Publications: Pridy, C. B. (2005). “Funk Assimilation” from Three Kicks for Saxophone Quartet [Recorded by the UBC Saxophone Quartet]. On Nice Work If You Can Get It [CD]. Vancouver, BC: University of British Columbia School of Music.
Pridy, C. B., & Cogswell, F. (2002). “Cross-Grained Tree” from Five Expressions of a Nearby God: for mezzo-soprano and pianoforte. Musical score. Special Collections Archives (M2113.P75 2002). Harriet Irving Library, University of New Brunswick, Fredericton.


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Kayla Joyce

Kayla Joyce

MSc. Student

I graduated from Dalhousie University in 2017 with a BSc (Hons.) in psychology and I am currently completing my MSc in psychiatry research under the supervision of Dr. Sherry Stewart. Broadly speaking, my research and clinical interests involve the relationship between mood disorders, such as depression, and addictive behaviors. Similarly, my master’s thesis aims to examine relations between mood states, why female's use cannabis, and cannabis use quantity across the menstrual cycle. I am interested in determining if female's use cannabis for specific emotion-focused reasons at certain points of their menstrual cycle. Following the completion of my MSc in psychiatry research, I aim to further my educational pursuits by applying to a PhD in clinical psychology.

Awards: 2018-2019: Joseph-Armand Bombardier Master's Scholarship (SSHRC)
2017-2019: Nova Scotia Health Research Foundation (NSHRF) Scotia Scholars Award (Master’s)
2017-2019: Nova Scotia Graduate Scholarship
Publications: Joyce, K. M., Hudson, A., O'Connor, R. M., Goldstein, A., Ellery, M., McGrath, D., Perrot, T., & Stewart, S. H. (In press). Retrospective and prospective assessments of gambling-related behaviors across the female menstrual cycle. Journal of Behavioral Addictions November 2018.
Joyce, K. M., & Stewart, S. H. (In press). Standardization of menstrual cycle data for the analysis of intensive longitudinal data. In O. I. Lutsenko, Menstrual Cycle. London: United Kingdom. Intech Open Science.
Al-hamdani, M., Joyce, K. M., Cowie, M., Smith, S., & Stewart, S. H. (2019). Too little, too much or just right; Injury/illness sensitivity and intentions to drink as a basis for alcohol consumer segmentation. Substance use and Misuse.
Joyce, K. M., Hudson, A., O’Connor, R. M., Thompson, K., Hodgin, M., Perrot, T., & Stewart, S. H. (2018). Changes in Coping and Social Motives for Drinking and Alcohol Consumption across the Menstrual Cycle. Depression and Anxiety.

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Chris DeWolfe

Chris DeWolfe

Ph.D. Student

Before starting my Clinical Psychology degree at Dalhousie, I completed my Master’s degree in Sport and Exercise Psychology. My research focuses on anxiety sensitivity as a target for transdiagnostic interventions and the use of physical activity for improving mental health and addictions.

Awards: 2017-2019 Nova Scotia Health Research Foundation Scotia Scholars Award (Master’s).
2017-2019 Nova Scotia Graduate Scholarship (Master's). p

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Lydia Muyingo

Lydia Muyingo

Ph.D. Student

I graduated from the University of Ottawa in 2017 with an honours degree in Psychology in French Immersion. My research interests include the partner influences of alcohol and substance use as well as substance use in youth.

Awards: 2017-2018 Scotia Support Masters Scholarship for Training in Addictions Research.

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Undergraduate Students

Kyra Farrelly

Kyra Farrelly

Honours Student

I’m a fourth-year undergraduate student in psychology. My interest in substance use and mental health developed when I had the opportunity to complete a third-year project with Dr. Sherry Stewart and continue my work as a summer RA. In the past I have looked at romantic partner drinking and perceptions of alcohol problems. This only grew my interest in substance misuse and motives. My honours project explores the role of coping motives in cannabis users with trauma histories and the impact on craving after trauma exposure. After I graduate I hope to continue my work in psychology and pursue a Ph.D. in clinical psychology.


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Brett Hopkins

Brett Hopkins

Honours Student

I am a fourth-year Bachelor of Science student at Dalhousie and will be graduating in 2019 with a major in Psychology and a minor in Health Studies. My honours thesis examines plain cigarette packaging and smoking behaviour. I am passionate about reducing health inequities for Canadians and contributing evidence-based research to improve the health status of vulnerable populations—e.g. how the social determinants of health make some populations more vulnerable to substance use and addiction. After graduating, I hope to enter the field of Community Health and Epidemiology to continue my research.

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Agnes Hardardottir

Agnes Hardardottir

Honours Student

I am a fourth-year Bachelor of Science student studying Psychology at Dalhousie; and will be graduating in May of 2019 with my honours in the field. My honours project focuses on the effect of plain cigarette packaging on attention and craving in an adult-smoker sample. My research on addictions has made me increasingly aware of other social issues. Specifically, the merging of clinical and social psychology topics, such as the personal ramifications of sexual assault on the victim from a clinical perspective, as well as the conjunctive ramifications of sexual assault on society as a whole. Following graduation, I am hoping to continue my research in this imperative and continually interesting field by pursuing a M.Sc. as well as a Ph.D. in clinical psychology.

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Nacera Hanzal

Nacera Hanzal

Honours Student- Medical Sciences

I am a fourth-year undergraduate student in Medical Sciences. I developed an interest in mental health when I became aware that, as students, it is often easy to neglect one’s own mental health. My experience as a student and research assistant in the MAAC lab offered me more insight on the topic. I am interested in understanding how individuals use substances to cope with anxious and depressed mood – particularly in youth and vulnerable populations. After graduating, I hope to pursue studies in the medical field that combine both the clinical and research aspect of mental illnesses in order to optimize interventions for substance use disorders.

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Comprehensive Students

Michelle Tougas

Michelle Tougas

Comprehensive Student

I completed my Master’s in Community Health and Epidemiology at Dalhousie University and am currently a PhD student in the Clinical Psychology program. My work with Dr. Stewart is exploring the influence of drinking motives (e.g., to cope with anxiety or depression) on alcohol consumption in friendship dyads experiencing conflict.


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Elizabeth McKay

Elizabeth McKay

Comprehensive Student

I am in my first year of the Clinical Psychology program. I completed my BSc (Hons) in Psychology at Dalhousie, focusing my research on children’s language development; particularly, factors that aid successful reading comprehension. Further, I studied the academic abilities of university students with undiagnosed reading difficulties. Now, for my second comprehensive project for which I will be working with Dr. Stewart, I am continuing to study the academic abilities of university students with undiagnosed reading difficulties, but incorporating information about personality traits and substance use to determine how these factors influence the academic success of this population. I am greatly looking forward to broadening our understanding of this population’s academic abilities and the factors that influence said abilities, as well as for the opportunity to work with Dr. Stewart!


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Medical Students

Leah Jones

Leah Jones

Medical Student

I graduated from Dalhousie in 2013 with a BSc in Biology, and am currently in Dalhousie Medicine's Class of 2018. My research interests lie in motives for use and addictions among marginalized populations. Clinically I am most interested in being a generalist, potentially a career in Emergency Medicine where hopefully I can practice within my research interests!
Awards: 2015 - Faculty of Medicine ‘Marvin Burke Summer’ Studentship, Competitive Research Studentship for medical student summer research in Alcohol and Substance abuse
2014 and 2015 - African Nova Scotian Science Profession Scholarship, For demonstrating commitment and resilience in achieving academic success and making a difference in the African Nova Scotian community
2009 - African Nova Scotian Post-Secondary Award, African Canadian Services
Publications: Jones, Leah, Campbell, Sam. Emergency Department’s Case of the Month: “A Spotty Problem”. The Canadian Journal of Diagnosis. 2016. April.


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