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Gillian Alcolado


Dr. Sherry Stewart, Professor of Psychiatry, Psychology, and Community Health and Epidemiology, Department of Psychiatry and Psychology, Dalhousie University, Halifax, NS Canada
B3H 4J1
Phone: 902-494-3793/4546 (Lab/Office)
FAX: 902-494-6585; Email:

Dr. Sherry H. Stewart, Ph.D., is a professor in the Departments of Psychiatry, Psychology, and Community Health and Epidemiology at Dalhousie University, as well as a licenced clinical psychologist in the province of Nova Scotia. She is well known for her research on psychological factors contributing to alcohol abuse, pathological gambling, and the comorbidity of mental health and addictive disorders. Dr. Stewart holds a Governor-in-Council appointment with the Canadian Centre of Substance Abuse, and is Editor-in-Chief for the Journal of Gambling Issues. Dr. Stewart receives funding from several research agencies including the Social Sciences and Humanities Research Council (SSHRC), Canadian Insitutes of Health Research (CIHR), the Nova Scotia Health Research Foundation (NSHRF), National Center for Responsible Gambling (NCRG) and the Manitoba Gambling Research Program (MGRP).



Pam Collins, Gambling Lab Manager

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.


Jennifer Swansburg , Project Manager, Gambling Study

I recently returned to school completing a BSc in Psychology at Dalhousie University. Over the past few years I have enjoyed working as a volunteer on several research studies in Dr. Stewart’s lab. Currently, I am working as a project manager on a Motivation-Matched Treatment Study with Pathological Gamblers.











Graduate Students


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.  


2016/2017 Killam Predoctoral Scholarship-Level 2
2016/2017 Honorary Nova Scotia Graduate Scholar
2015/2016 Joseph Armand Bombardier Canada Graduate Scholarship - Master's


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.



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. 

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

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



Ivy-Lee Kehayes , Ph.D. Student

I graduated from Dalhousie University in 2013 and am currently enrolled in the second year of my PhD in Clinical Psychology. My research interests include drinking motives and alcohol use, and how social influences in romantic relationships can affect both of these things.

2015-2018     Eliza Ritchie Scholarship
2014-2016     Killam Predoctoral Scholarship
2014-2015     D. O. Hebb Post-Graduate Prize
2014-2015     Joseph-Armand Bombardier Canada Graduate Master's Scholarship

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, doi:10.1037/a0037244



Sara Bartel , Ph.D. Student

I graduated from the University of Saskatchewan in 2016, and will begin the Clinical Psychology program at Dalhousie in the fall of 2016 under the co-supervision of Dr. Sherry Stewart and Dr. Simon Sherry. I am primarily interested in eating and anxiety disorders, as well as the overlap of these disorders with substance abuse.

2016-2017  Killam Predoctoral Scholarship
2016-2017  Nova Scotia Graduate Scholarship
2016-2017  Frederick Banting and Charles Best Canada Graduate Scholarship

Bartel, S. (2015). Exercise-induced improvements in cognitive functioning and brain structure in ​ older adults. University of Saskatchewan Undergraduate Research Journal, 2(2), 1-10.



Annie Chinneck , Ph.D. Student

I am most interested in studying the psychological factors (including motives, personality, and implicit cognitions) that contribute to alcohol abuse, to prescription drug misuse, to pathological gambling, and to the comorbidity of mental health and addictive disorders.

2014-2015 D. O. Hebb Post-Graduate Prize
2014-2015 Scotia Scholar Master’s Award
2013-2015 Killam Predoctoral Scholarship
2013-2014 Joseph-Armand Bombardier Canada Graduate Master’s Scholarship

Chinneck, A., Mackinnon, S. P., & Stewart, S. H. (Submitted November 2014, paper under review). Investigating possible reciprocal relationships between depressive and problem gambling symptoms in emerging adults. Canadian Journal of Psychiatry.

Goodwill, A., Bennell, C., & Chinneck, A. (2014). New methods for researching crime linkage analysis. In Woodhams, J., & Bennell, C. (Eds.), Crime Linkage: Theory, research, and practice. Boca Raton, FL: CRC Press.

Higgins, C., Duxbury, L., & Chinneck, A. (Paper submitted December 2014, paper under review). Barriers preventing the retention and promotion of female police officers. Criminology.

Paquet, L., Collins, B., Song, X., Chinneck, A., Bedard, M., & Verma, S. (2013). A pilot study of prospective memory functioning in early breast cancer survivors. The Breast, 22, 455-461.



Melissa Stewart, Ph.D. Student

I am currently enrolled in my fifth year of the Clinical Psychology PhD program under the supervision of Dr. Sherry Stewart. At present, I am completing my predoctoral internship with the Calgary Clinical Psychology Residency Program. My research interests include gambling outcome expectancies, gambling behaviour, and the impact of gambling-related cues (e.g., gambling advertisements) on the activation of implicit and explicit gambling outcome expectancies. I am also interested in research examining the effectiveness of responsible gambling strategies (e.g., pop-up messages) as a means of minimizing the harm associated with slot machine gambling. My clinical interests include the assessment and treatment of operational stress injuries (e.g., posttraumatic stress disorder, anxiety and depressive disorders) among military and RCMP members, as well as forensic psychology, addictions, and severe mental illness.


2013-2015       Killam Predoctoral Scholarship
2010-2013       Joseph-Armand Bombardier Canada Graduate Scholarship, Doctoral level
2011-2012       Nova Scotia Gaming Foundation Gambling Research Scholarship
2010-2012       Dalhousie University President’s Award

Selected Publications

Stewart, M.J., Stewart, S.H., Yi, S., & Ellery, M. (2015). Predicting gambling behaviour and
problems from implicit and explicit positive gambling outcome expectancies. International
Gambling Studies, 15, 124 – 140.

Stewart, M.J., Yi, S., & Stewart, S.H. (2014). Effects of gambling-related cues on the activation
of implicit and explicit gambling outcome expectancies in regular gamblers. Journal of Gambling Studies, 30, 653 – 668.

Stewart, M.J., Fulton, H.G., & Barrett, S.P. (2014). Crack and powder cocaine use among
opioid users: Is all cocaine the same? Journal of Addiction Medicine, 8, 264 – 270.

Stewart, M.J. & Watt, M.C. (2014). Substance use and mental health problems among Canadian
women offenders. Psynopsis, Spring Issue.

Stewart, M.J., & Wohl, M.J.A. (2013). Pop-up messages, dissociation, and craving: How
monetary limit reminders facilitate adherence in a session of slot machine gambling. Psychology
of Addictive Behaviors, 27, 268 – 273.




Jamie-Lee Collins, Ph.D. Student

I graduated from the University of Western Ontario in 2011 and I am currently enrolled in my fourth year of the Clinical Psychology PhD program under the supervision of Dr. Sherry Stewart. My research interests include drinking motives, drinking behaviours, and how social anxiety may affect both of these. My clinical interests include neuropsychology, forensics, and addictions. I received a SSHRC Joseph Bombardier Master's Level scholarship in 2011, the Durand Jacob's award for best graduate student paper in psychology of addictions in 2012, and the Psychiatry Research Day best graduate student presentation award in 2014. I currently have one second-author publication in Addictive Behaviors, titled "The effects of nicotine stimulus and response expectancies on male and female smokers' responses to nicotine-free electronic cigarettes." 

Copp, S. R., Collins, J. L., Dar, R., & Barrett, S. P. (in press). The effects of nicotine stimulus and response expectancies on male and female smokers’ responses to nicotine-free electronic cigarettes. Addictive Behaviors.

Collins, J. L., Sherry, S. B., Battista, S., Glowacka, M., Mushquash, A., & Stewart, S. H. (2014, October). Drinking to cope mediates the relationship between social anxiety and alcohol-related problems. Poster session presented at Psychiatry research Day, Halifax, NS, Canada. ​ 

Collins, J. L., Sherry, S. B., Sherry, D. L., & Stewart, S. H. (2014, June). How stable are frequency of, quantity of, and problems with alcohol use in undergraduates? A 4-wave, 18-month longitudinal study. Poster session presented at Research Society on Alcoholism, Bellevue, Washington, U.S.A.



Susan Battista

Marie-Eve Couture, Ph.D. Student

I am interested in polysubstance use and co-morbid psychological disorders, and my dissertation will hopefully focus on that subject. Currently, I am investigating pathological gamblers, co-morbid psychological disorders, and possible treatment options adapted to each gambler subtype. I recently completed an honours thesis that investigated smokers, their processing of threatening health messages, and whether this processing could be increased using classical conditioning.



Honours Students

Zarrin Ghafari, Honours Student

This fall, I will be entering the fourth year of my BSc, Honours in Psychology. I started volunteering in Dr. Sherry Stewart's lab this past January. Due to my interest in addictive behaviors and gambling, I decided to pursue my honours in this particular lab. In relation to my honours project, supervised by Dr. Sherry Stewart, I will examine whether an electronic gambling machine can cross-prime motivation for stimulants in groups of participants who regularly use cocaine or crack cocaine, but have no gambling-related disorder. After completing my undergraduate studies, I am looking forward to enrolling into the graduate program of Clinical Psychology.





Nicholas Sacre, Honours Student

In June of 2016, I graduated with distinction from Dalhousie’s Faculty of Science with a B.A. majoring in Psychology. I am returning to Dal this year to convert my major to an honours degree. I will be completing my honours research project on Dr. Stewart and Dr. Barrett’s study, which examines the use of marijuana in veterans coping with PTSD. Upon completion of my honours, I hope to pursue graduate studies in clinical psychology.  


Caitlin Smith

Kayla Joyce, Honours Student

This upcoming fall, I will be entering into the final year of my BSc, Honours in Psychology. In 2015, I had completed an independent research project in Dr. Stewart’s lab which examined woman’s mood, drinking motives and alcohol consumption across the menstrual cycle. Completing this independent research project has increased my interest in how a woman’s menstrual cycle phase effects one's motivations and mood. Supervised by Dr. Sherry Stewart, my honours project will use a daily diary method to examine links present between mood, gambling motives and gambling behaviour across the menstrual cycle. After graduation, I would like to pursue my Master’s degree in Clinical Psychology.


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Last updated: August 2016

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