Dr. Roger A. Dixon

RAD, Vancouver Island

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Publications (Recent)
Presentations (Recent)
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Student Research
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Mailing Address

Department of Psychology
P-217 Biological Sciences Bldg
University of Alberta
Edmonton, AB
Canada T6G 2E9



© 2017 Roger Dixon

Student Papers and Theses

Student Papers and Theses Students working with me and other VLS researchers have received numerous recognitions for their successful efforts. Here is a selected set of examples, including Awards and Research Productivity.

Awards for Research: Recent and former trainees have received many awards for their work. These include the following recent recognitions.

Peggy McFall: Recipient of the 2017 ASC-CCNA poster award in the Postdoctoral Category at the Second Annual CCNA Science Day Trainee Poster Competition in Toronto, Ontario.

Sheri Thibeau: Recipient of the 2017 ASC-CCNA poster award in the PhD Category at the Second Annual CCNA Science Day Trainee Poster Competition in Toronto, Ontario.

Shraddha Sapkota: A 2-year Postdoctoral Fellowship from the Alzheimer Society of Canada (2017-2019). This award will be held at Sunnybrook Health Sciences Centre, University of Toronto.

Kirstie McDermott: The 2016 outstanding student poster at the prestigious Alzheimer’s Association International Conference.

Shraddha Sapkota: The 2014 Emerging Scholar Award from the Gerontological Society of America.

Stuart MacDonald: The 2013-14 Baltes Award for junior (postdoctoral less than 10 years) investigators from the Gerontological Society of America.

Correne DeCarlo: The 2013 Rennick Award for graduate student research from the International Neuropsychological Society.

Shannon Runge: The 2012 graduate student award for interdisciplinary research from the Gerontological Society of America

Research Activities and Topics: Trainee research activities often lead to scientific conference presentations, graduate theses (MSc, PhD), and even publication. Below is a partial list of recent activities by students engaged in VLS research.

Sheri Thibeau (2017). Alzheimer's disease biomarkers interactively influence physical activity, mobility, and cognition associations in a non-demented aging population. Paper accepted for publication in the Journal of Alzheimer's Disease (2017).

Kirstie McDermott (2016). Exceptional Memory in Aging: Trajectory-based Phenotype, Transfer Effects, and Biomarker Predictors. MSc Thesis in Neuroscience (Defense September 2016).

Shraddha Sapkota (2016). In non-demented aging, executive function performance and change is predicted by apolipoprotein E, intensified by catechol-O-methyltransferase and brain-derived neurotrophic factor, and moderated by age and lifestyle. Paper published in Neurobiology of Aging (2017).

Cassandra Brown (2015-16). Cognitive Activity Mediates the Association between Social Activity and Cognitive Performance: A Longitudinal Study. Paper accepted for publication in Psychology and Aging. (Supervised by Andrea Piccinin)

Sheri Thibeau (2015-16). Genetic factors moderate everyday physical activity effects on executive function in aging. MSc thesis published in Neuropsychology (2016).

Samantha Fu (2015-16) Subjective Cognitive Impairment.

Kirstie McDermott (2015-16). Cognitive Resilience to Alzheimer’s Genetic Risk. This paper received the outstanding student poster award at the Alzheimer’s Association International Conference (Toronto, 2016) and is submitted for publication.

Shraddha Sapkota (2015-16). Synergestic Associations of Genetic, Demographic, Health, and Lifestyle Risk Factors on Neurocognitive Performance and Changing in Aging. PhD Dissertation in Neuroscience Completed.

Shraddha Sapkota (2015). Synergistic associations of COMT and BDNF with executive function in aging are selective and modified by APOE. Paper published in Neurobiology of Aging (2015).

Shannon Runge (2014). APOE moderates the association between lifestyle activities and cognitive performance: Evidence of genetic plasticity in aging. Paper published in Journal of the International Neuropsychological Society (2014).

Correne DeCarlo (2014). The Concept and Promise of BioAge in Neurocognitive Aging. (Supervised by S. MacDonald, UVic). [Update: Published in Ageing Research Reviews, 2014].

Correne DeCarlo (2014-15). Vascular and Genetic Predictors of Mild Cognitive Impairment. (Co-Supervised by RA Dixon and S MacDonald). [Update: Published in Journal of Gerontology: Psychological Sciences, 2016].

Correne DeCarlo (2014). The Concept and Promise of BioAge in Neurocognitive Aging. (Supervised by S. MacDonald, UVic). [Update: Published in Ageing Research Reviews, 2014].

Correne DeCarlo (2014-15). Vascular and Genetic Predictors of Mild Cognitive Impairment. (Co-Supervised by RA Dixon and S MacDonald). [Update: Under Editorial Review].

Kirstie McDermott (2014-15). Risk and Protective Factors of Healthy Brain and Memory Aging.

Shannon Runge (2014-15). Genetic Plasticity in Aging. (Supervised by B. Small, USF).

Shraddha Sapkota (2014-15). Building and Testing Composites of Genetic and Other Alzheimer’s Risk Factors in Memory Aging.

Shraddha Sapkota (2015). Intensification Effects for Genetic Risk in Executive Function Decline. (Supervised by RA Dixon and L Bäckman). [Update: Presented at International Neuropsychological Society 2015].

Sheri Thibeau (2014-15). Genetic and Physical Activity Interactively Predict Cognitive Change in Aging. [Update: Under Editorial Review].

Tran Tran and Shraddha Sapkota (2014-15). Metabolomics Analyses in Distinguishing and Normal Aging, Mild Cognitive Impairment, and Alzheimer’s Disease. (Co-supervised by L Li and RA Dixon). [Update: Presented at Alzheimer’s Association International Conference 2015].

Correne DeCarlo (2013). Genetic influences and Vascular Health Moderate Mild Cognitive Impairment Status and Stability (UVic student, supervised by Stuart MacDonald, VLS).

Shannon Hendrix-Buxton (2013). Apolipoprotein E Genotype Moderates the Benefits of Lifestyle Activities on Cognitive Decline (USF student, supervised by Brent Small, VLS).

Peggy McFall (2013). IDE (rs6583817) Polymorphism and Type 2 Diabetes Differentially Modify Executive Function in Older Adults.

Shraddha Sapkota (2013). Longitudinal Associations of Genetic Polymorphisms and Personality Traits: Independent and Interactive Effects on Neurocognitive Performance in Older Adults. (Master's Thesis)

Shraddha Sapkota and Sydney Pearson (2013). From Global Metabolomics to Candidate Metabolites: Linking CNS and Neurocognitive Phenotypes in Aging.

Amanda Warnock (2013). Metabolomics of Neurodegenerative Disease (MCI, AD, PD).

Bonnie Whitehead (2013). CLU, CR1 and PICALM: Genotypic Effects on Mild Cognitive Impairment Status and Stability. (Master's Thesis)

Nickie Cowan (2012). Mobility Dysfunction—APOE Genotype Indicators: Implications for the VLS.

Peggy McFall (2012). The Longitudinal Effects of Insulin Degrading Enzyme and Type 2 Diabetes on the Executive Function Performance of Older Adults.

Shraddha Sapkota (2012). Testing Effects of BDNF and COMT Polymorphisms on Cognitive Functioning in Normal Aging.

Bonnie Whitehead (2012). Genotypic Effects of BDNF and COMT on Cognitive Performance in Type 2 Diabetes Patients and Healthy Older Adults.

Jessica Zvonkovic (2012). Alzheimer's Disease, Depression, and Genetic Associations.

Rhonda German (2011). "Superaging": Evidence and Approaches for the VLS.

Connor Keller (2010-2011). Olfactory Change Linked to Change in Cognitive Function (Supervisor: Stuart MacDonald).

Peggy McFall and Bonnie Whitehead (2011). Body Weight and Neurocognitive Aging: Exploring the Modifying Roles of Gender, Cohort, and Domain.

Stephanie Pelech (2011). Dopamine-related Genes in Cognitive Aging and Alzheimer's Disease.

Bonnie Whitehead (2010-2011). Data Base for Genetics in Healthy Aging and Alzheimer's Disease.

Demsky, A.N. (2010). Exploring the Effects of Obesity on Cognition.

Dolcos, S. (2010). Is Mild Cognitive Impairment Associated with Markers of Biological Vitality, Lifestyle Activity, and Psychosocial Affect? (PDF Project, Year 2)

Dolcos, S. (2010). Age-related Differences in the Effects of Automatic and Deliberate Emotion Regulation: A Functional Magnetic Resonance Imaging Investigation. (PDF Project, Year 1)

Geall, B.P. (2010). Neuropsychology of Type 2 Diabetes and Aging: Exploring Neurocognitive Speed and Inconsistency. (2010 Project)

McFall, G.P. (2010). Moderators and Mediators of Type 2 Diabetes-Cognition Relationships. (SYRP-2)

Wang, R. (2010). Olfactory Identification and Cognitive Functions in Aging.

Braslavsky, A. (2009). Exploring Effects of Mild Cognitive Impairment.

Cochrane, K.M. (2009). Use of Autobiographical Memory Cues as Cognitive Support for Episodic Memory: Comparison of Persons With Mild-Stage Alzheimer's Disease and Healthy Older Adults. (Doctoral Dissertation)

Fisher, A.L. (2008). Short-term Longitudinal Trends in Cognitive Performance in Older Adults with Type 2 Diabetes.

Tippe, S. (2007). Non-steroidal anti-inflammatory drugs and normal cognitive aging: Initial evidence from the Victoria Longitudinal Study.

Yeung, S. (2007). Exploring Effects of Type 2 Diabetes on Cognitive Functioning in Older Adults.

Feltmate, S. (2006). Social Engagement and the Presence of Mild Cognitive Impairment. (FYRP)

Mansueti, L. (2005). Inconsistency Following Stroke in Older Adults. (Master's Thesis)

Tan, J. (2004). Influence of impending death on the MMSE. (Master's Thesis, E. Strauss, Supervisor)

de Frias, C.M. (2003). Memory Compensation in Older Adults: Assessment of Structural Characteristics and Individual Growth Trajectories. (Doctoral Dissertation)

MacDonald, S.W.S (2003). Longitudinal Profiles of Terminal Decline: Associations Between Cognition, Age, Mortality, and Time to Death. (Doctoral Dissertation)

Cohen, A.-L. (2002). The Intention Superiority Effect and Aging: Similar Magnitude of Effects in an Interference Paradigm. (Doctoral Dissertation)

Hazlitt, J.E. (2000). Longitudinal Changes in Semantic Memory Performance of Older Adults. (Master's Thesis)

Cohen, A.-L. (1999). Prospective Memory and Aging: The Effect of Perceptual Salience. (Master's Thesis)

Hopp, G.A. (1999). A Comparison of Performance on Measures of Executive Function and Metacognition in Normal Aging and Parkinson's Disease. (Doctoral Dissertation)

Crow, C.B. (1998). The Way We Were: Retrospective Evaluations of Memory Performance in the Elderly.(Master's Thesis)

Fox, D.P. (1997). Effects of Collaboration on Problem Solving Performance in Healthy Elderly Couples and Parkinsonian-Caregiver Dyads. (Doctoral Dissertation)

Martin, R.R. (1997). Implicit Theories of Aging: Managing Professional Development. (Master's Thesis)

Gagnon, L.M. (1995). Collaborative remembering: Are there age-related differences in working with a stranger or with a spouse? (Master's Thesis)

Friesen, I.C. (1993). Intraindividual variability in the cognitive functioning of an Alzheimer's patient and healthy old adults. (Master's Thesis)

Gould, O.N. (1993). Recall of medication instructions by young and old adult women: Is overaccommodative speech helpful? (Doctoral Dissertation)

Hopp, G.A. (1993). Longitudinal study of the cognitive performance of healthy and demented very old adults. (Master's Thesis)

Rich, J.B. (1993). Pictorial and Verbal Implicit and Recognition Memory in Aging and Alzheimer's Disease: A Transfer-Appropriate Processing Account. (Doctoral Dissertation)

Kurzman, D. (1992). The construct validity of the clock test in normal and demented adults. (Master's Thesis)