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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.





Craig Moore, Project Manager, Pro Social Project

I completed my undergraduate degree at the University of Ottawa completing my honours thesis in Psychology on multiple victimization among young adults. I also completed a diploma in police foundation at Algonquin College before starting my master’s degree in Applied Social Psychology at the University of Saskatchewan. I am a board member with the Nova Scotia chapter of the Canadian Evaluation Society currently working towards my Credentialed Evaluator (CE) designation. I support a variety of projects in the lab, including the Dalhousie ProSocial Project.


Negar Vakili, Research Assistant

I received my Bachelor of Science degree in chemistry and biology from Dalhousie University. Over the course of my program, I focused mainly on drug and molecular design. During my undergraduate degree I worked on a research project studying the impact of Memantine on Alzheimer’s disease. Another project I worked on was the study of transgenic Caenorhabditis elegans as a model system in therapeutic science and medicinal biology.  After graduating I started working as a research assistant at Dr. Stewart’s laboratory. I have always been interested in how drugs impact an individual’s behavior, and working in Dr. Stewart’s laboratory allows me to further pursue this interest.


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.



Colin Pirdy , Ph.D. Student

Hello! I’m starting the Clinical PhD program this year. This is my second time at Dalhousie; I completed a degree in music and psychology in the early 2000s. I’ve since done graduate work in music at the University of British Columbia and I worked as a composer and music educator in Vancouver. Going forward, I’ll be examining the potential for music listening as a treatment strategy for high anxiety sensitivity, with Margo Watt and Sherry Stewart supervising. I’ve been known to enjoy the piano, composing, gaming, swimming, walking, and trying to keep up with my 4-year old daughter.





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.





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 

Caitlin Smith

Trevor Shannon, P3000 Student

A 3rd year undergraduate Psychology student, I developed an interest in the psychology of addictive behaviours just over two years ago when I myself decided to stop drinking. This interest ultimately spurred my return to university to pursue a degree in Psychology, with the hope of eventually parlaying it into further post-graduate studies and a career in the field. I have been involved with the Stewart lab for just less than a year, and have been fortunate to work on the Caring Campus Project and now on my own P3000 project examining the drinking motives of same-sex friends, aged 18-25, who have known one another for less than a year.  I am looking forward to delving further into the project, and getting to partake in other projects in the Stewart lab in the future.


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Last updated: October 2016

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