Adele Diamond

Professor

Research Interests

executive functions
prefrontal cortex
dopamine
working memory
self-control
self-regulation
cognition
COMT gene
Sex differences
stress
ACEs (adverse childhood experiences)
ELS (early life stress)
resilience
social determinants of health
ADHD
depression
PTSD
Physical Activity
the arts
mindfulness

Relevant Degree Programs

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Biography

Adele Diamond is the Canada Research Chair Professor of Developmental Cognitive Neuroscience at the University of British Columbia (UBC) in Vancouver, Canada and Head of the Program in Developmental Cognitive Neuroscience at UBC. She was educated at Swarthmore (where she received her BA, Phi Beta Kappa), Harvard (where she received her PhD), and Yale Medical School (where she was a postdoctoral fellow). She grew up in New York City and attended public schools P.S. 165, Parsons Junior High, and John Bowne High School. She was the first person in her family to attend college.

Prof. Diamond has received numerous awards and honors and has held US government National Institute of Health R01 research grants continuously for over 30 years and overseen over $24 million in research funding. She has given over 500 invited addresses, including at the White House and to individuals such as the Dalai Lama and Bill Gates, in over 40 countries across 6 continents. She serves on 18 external advisory boards and 8 editorial boards, including those of all 3 major journals in Developmental Psychology.

Adele Diamond’s specialty is executive functions, which depend on the brain’s prefrontal cortex and interrelated neural regions. She studies how executive functions are affected by biological factors (such as genes and neurochemistry) and by environmental ones (for example, impaired by stress or improved by interventions). Her work on the unusual properties of the dopamine system in prefrontal cortex led to her identifying the biological mechanism causing executive function deficits in children treated for phenylketonuria (PKU) and definitively documenting those deficits, resulting in the guidelines for the medical treatment of PKU changing around the globe. Further discoveries of hers led to (a) a worldwide change in the recommended starting time for treatment of PKU, (b) changes in the clinical perception and treatment of the inattentive type of ADHD, and (c) early education practices worldwide, improving millions of children’s lives
.
Prof. Diamond’s work has emphasized that executive functions can be improved even in the very young and very old, and anywhere in-between, and that addressing social and emotional needs may be central to whether EFs improve and whether those improvements last. Thus. Prof. Diamond offers a markedly different perspective from traditional medical practice in hypothesizing that treating physical health, without also addressing social and emotional health is less efficient or efficacious. And, Prof. Diamond offers a markedly different perspective from mainstream education in hypothesizing that focusing exclusively on training cognitive skills is less efficient, and ultimately less successful, than also addressing emotional, social, spiritual, and physical needs.

Research Methodology

behaviour
randomized control trials (RCTs)
molecular genetics
psychoneuroendocrinology
neuroimaging (fMRI)
mixed methods (quantitative & qualitative)

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Master's students
Doctoral students
Postdoctoral Fellows
2020
2021

In traumatized youth, can prefrontal cortex communication with the amygdala be restored by a stress-reduction program (e.g., Niroga’s yoga-based mindfulness program)? Are the benefits of music for improving executive functions (EFs), mood, and quality of life greater when the experience of listening to the music is socially shared? Can the benefits of listening to the spoken word be as great as those of listening to music for EFs, mood, and quality of life? Modeling gonadal hormone and COMT genotype modulation of the effects of mild stress on EFs pharmacologically with low-dose methylphenidate Will individuals be more emotionally invested in EF training if they have a say in shaping the training activity and will that translate into greater EF benefits?

I support public scholarship, e.g. through the Public Scholars Initiative, and am available to supervise students and Postdocs interested in collaborating with external partners as part of their research.
I support experiential learning experiences, such as internships and work placements, for my graduate students and Postdocs.
I am open to hosting Visiting International Research Students (non-degree, up to 12 months).
I am interested in hiring Co-op students for research placements.

Supervision Enquiry

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Graduate Student Supervision

Doctoral Student Supervision (Jan 2008 - May 2019)
Using a Neurosequential Model of Therapeutics (NMT) based behaviour plan in elementary schools (2018)

There is a growing body of evidence that early stress such as neglect, maltreatment and other adverse childhood experiences (ACEs) affect the way a children’s brain develops, making them more vulnerable to mental health problems. When these children reach school age, they are more likely to be identified as having learning, behaviour or social problems, and becoming students “at-risk”. The literature suggests that one of the reasons why these children have difficulty in school is that their nervous systems may be geared to prioritize managing fear rather than to processing information. In other words, the lower-order stress response system is given priority over the higher-level functions of processing information and learning, including executive functions. This study was a naturalistic pilot project designed to assess the use of a Neurosequential Model of Therapeutics (NMT) assessment to inform a behaviour plan for elementary school students who have a history of adverse childhood experiences. The study involved two cohorts of four children, ages 6 – 9, who had a history of adverse childhood experiences and had been identified as needing a high level of behavioural support within the mainstream classroom. Over a period of 4 months, one cohort received a trauma-informed behaviour plan based on an NMT assessment, the other cohort received a behaviour plan based on a Functional Behaviour Assessment. Percentage of academic engaged time and heart rate variability were tracked over the course of the intervention. Pre and post measures of executive functions were gathered. For the four students in the NMT cohort, a pre and post NMT metric was produced, as well as a pre- and post NME mini map. Neither of the interventions were demonstrated to be effective, which is most likely due to the complex challenges of the naturalistic setting in the school context. However, some interesting trends were identified that would suggest that further research would be warranted.

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Master's Student Supervision (2010 - 2018)
Potential sex difference in the effects of mild acute stress on executive functions (2016)

Prefrontal cortex (PFC)-dependent executive functions (EFs) are critical for reasoning, problem-solving, self-control and planning. The PFC dopamine (DA) level has been demonstrated to modulate EFs in an inverted U-shaped curve, where an intermediate level of DA is optimal. Unlike in other brain regions, PFC DA systems: 1) relies highly on the catechol-O-methyltransferase (COMT) enzyme for clearing released DA; and 2) can be activated even by mild stress. Estradiol (E2) has been shown to down-regulate COMT gene transcription, causing the activity of COMT enzyme to be ~30% less in women than in men. Animal studies have repeatedly shown that stress facilitates cognitive functions dependent on the hippocampus and / or PFC in males, but impairs them in females. Therefore, based on Diamond’s hypothesis that baseline PFC DA levels are higher and closer to the optimal level in women during menstrual phases when their circulating E2 are elevated, than in men, we predicted that mild stress would facilitate EF performance in men but impair it in women when their circulating E2 levels are high. In a crossover design, healthy young adults (both men and women), all COMT Val¹⁵⁸Met heterozygotes, were each tested twice (once with social-evaluative stress and once without, order counterbalanced) on five EF tasks which tapped on the core EFs of inhibitory control, working memory and cognitive flexibility, and one higher-level EF, reasoning. Women were randomly assigned to the low-E2 (F-L) group or high-E2 (F-H) group. Women in the F-L group were tested during the early follicular phase (low E2 level). Women in the F-H group were tested during the midluteal phase (high E2 level). Our social-evaluative procedure was showed to succeed in inducing physiological and subjective stress responses and significantly impaired the performance of the F-H group on one index of inhibitory control, whereas the performance of the M and F-L groups showed a trend towards enhancement. Similar trends (M and F-L: stress-induced enhancement; F-H: stress-induced impairments) were found for some other indices in the first two tasks. These results emphasized that the ways of improving EFs need to be considered in a sex-specific and hormone-dependent manner.

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News Releases

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Publications

Current Students & Alumni

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Daphne Ling

Doctor of Philosophy in Neuroscience (PhD)

Research Topic
The Neural Basis of Low-Dose versus Normal-Dose Psychostimulants on Executive Functions in Youth with Attention-Deficit / Hyperactivity Disorder: A Randomised Controlled Trial
 
Adele Diamond's Profile
ORCID Profile
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Supervision Enquiry

Membership Status

Member of G+PS
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Program Affiliations

Neuroscience

Department(s)

Department of Psychiatry
 

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