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Our Team

Dr. Queenie Lo, Ph.D., C.Psych.


Dr. Lo graduated with her doctorate from the School and Clinical Child Psychology program (APA and CPA accredited) at OISE/University of Toronto in 2007. During her predoctoral internship and postdoctoral fellowship at Sickkids Centre for Community Mental Health (previously known as the Hincks-Dellcrest Centre), she further received intensive theoretical and clinical training in attachment-based therapy, play therapy, and adult psychotherapy. She completed the licensing requirements of the College of Psychologists of Ontario in 2009 and granted a certificate of autonomous practice as Registered Psychologist, with declared competency to work with children, adolescents, and adults.

She worked in a variety of settings including the hospital, the school board, and community based out-patient program.  She held part-time appointments as Psychologist at St. Catharines General Hospital, as well as at Toronto Catholic District School Board. She currently continues to be Consultant Psychologist for a trauma program in Toronto. She regularly provides clinical supervision for psychology students and post-doctoral fellows.

Dr. Lo has a particular interest in personality functioning and the betterment of psychological well-being. She believes the best outcomes are achieved through working collaboratively with the patient. When working with children, working with the parents and families is often an integral part of the therapeutic process. From her nine years of graduate and post-doctoral education and training in Clinical Psychology and ten years of practice, she has recognized the undeniable uniqueness and complexity of the emotional and relational experiences for each individual, whether a very young child or an adult, which manifest as a variety of subjective satisfaction/distress and thought and behavioural patterns. This insight highlighted her belief in the necessity of ongoing assessment and comprehensive understanding of the patient’s needs, facilitated by sound theoretical knowledge, empirical evidence, and clinical skills, in optimizing outcome.

Matt Costaris, B.Ed., M.A., PhD Candidate

Clinical Associate

Matt provides psychoeducational assessments and therapy to children, adolescents, and adults  under the supervision of Dr. Queenie Lo. He has experience in the assessment of learning disabilities, developmental disabilities and social-emotional difficulties. In therapy, he uses an integrative approach pulling from multiple theories, and has a particular interest in working within the family system.

Matt received his Master’s degree in School and Clinical Psychology from the University of Toronto in 2019 and is currently working towards his PhD in the same program. Prior to his work in psychology, Matt received his Bachelor’s in Education from the University of Toronto and spent five years teaching classes from Kindergarten to Grade 12.

Matt practices in a range of modalities, including Psychodynamic, Humanistic, Emotion-Focused and Cognitive-Behavioural. After working closely with the individual/family to hear their story, Matt draws upon techniques from each in order to create a treatment plan to best meet their needs. He also understands that goals often shift through the course of therapy, so he likes to include clients in the process throughout to ensure that they feel understood and believe in the work. Matt also recognizes the key role families play in their children’s’ lives and, when appropriate, tries to work with families as well in developing and maintaining positive behaviors.

Matt graduated with his Master’s in clinical psychology in 2019 and is currently pursuing his doctorate at OISE/University of Toronto, an CPA accredited program. Understanding that the therapeutic alliance is a major predictor of successful outcomes in therapy, his doctoral research expands upon his clinical interests as he investigates the best methods to engage children and adolescents in the treatment process, with a particular focus on at-risk populations. He has worked within the Toronto District School Board and private practices conducting assessments on children and adolescents with wide-ranging presenting issues. Prior to his work in psychology, Matt was a teacher, spending one year teaching kindergarten and four years in high schools teaching English, Mathematics and Social Studies. He tries to integrate his teaching experience with his clinical work, considering the realities of the classroom setting when making recommendations to best ensure that a student’s needs are met.

When not working, Matt loves to read, watch movies and enjoy the outdoors.

Bryanna Graves, M. Clin. Psy.

Clinical Associate (Markham Location Only)

Bryanna completed her Master’s degree in Clinical Psychology at Windsor University, and her Bachelor’s degree at the University of Toronto.  Throughout her career she has worked with at-risk youth facing numerous challenges such as homelessness, addiction, and mental illness. She has engaged in numerous research projects on topics related to self-harm, suicidality, and cognitive functioning in youth and adults. She has presented at numerous scientific conferences and co-authored research on topics ranging from treatment effectiveness to cognitive impairment.

Bryanna is in the process of registering with the College of Psychologists of Ontario as a Psychological Associate. As part of the rigorous registration process, Bryanna has been providing psychological assessments and therapy under the supervision of registered Psychologists. At our clinic, Bryanna provides psychological therapy for children, adolescents, and families under the supervision of Dr. Queenie Lo. She has experience in presenting problems related to anxiety, panic, obsessive-compulsive behaviour, depression, suicidal ideation and self-harm, as well as behavioural and emotional dysregulation.

Bryanna’s approach to therapy is eclectic (combining multiple therapeutic perspectives). She primarily uses a Cognitive-Behavioural approach while integrating Family Systems and Humanistic therapies, Emotion-Focused work, Play Therapy, Mindfulness, and Acceptance-Based practices. Bryanna believes in the innate worth and potential of every person. This allows her to see each client as unique and important. She approaches assessments and therapy non-judgementally, with honesty, and integrity. She strives to maintain a balanced lifestyle herself; in her spare time, she enjoys spending time with her loved ones, being physically active, or painting.

Cristina Rapuano, M.A., R.P.

Clinical Associate (Markham Location Only)

Cristina Rapuano is a Registered Psychotherapist, and a member in good standing with the College of Registered Psychotherapists of Ontario. Cristina completed her undergraduate degree in Psychology at York University. She holds a Master of Psychology Degree and a certificate in Trauma Psychotherapy from Adler Graduate School of Professional Psychology. Cristina is in the process of becoming registered with the College of Psychologists of Ontario. She works primarily work with adolescents and families under the direct supervision of Dr. Queenie Lo. She also works with the adult population.

Cristina has been providing services under the supervision of a Psychologist to a vast majority of populations. Cristina has worked under the supervision of a neuropsychologist administering, scoring, and assisting with the interpretation of psychological testing. She has facilitated sports psychology workshops for the youth population, educating them on how to be mentally aware and reach their maximum performance potential. Cristina has volunteered at the Centre for Addiction and Mental Health (CAMH). Cristina also has experience at an inpatient addiction centre providing individual therapy and conducting group workshops covering a variety of topics from week to week including but not limited to understanding trauma, effective communication, boundary setting, forgiveness and emotion regulation.

Cristina believes that the foundation of effective treatment, is built on trust in the therapeutic relationship between the therapist and client. Cristina’s goal is to create a safe space in which her clients are comfortable to express their inner feelings, thoughts, and emotions. Treatment is effective only when it is free of judgment and built on empathy and mutual respect. Cristina is eclectic in her treatment style, using a variety of treatment approaches including but not limited to, cognitive-behavioral therapy, supportive counseling, psychoeducation, relaxation training, pain management, thought disputation, and de-sensitization techniques. Treatment is ultimately tailored to each individual client, to ensure that their own specific needs are met.

Born and raised in Markham, Ontario, Cristina has a passion for travel and animals. She enjoys keeping active with regular exercise. She also enjoys spending quality time with her family and friends.

Samantha Chan, B.Sc. (Hons), M.Sc.

Clinical Associate

Samantha is completing her Doctoral degree in Clinical Developmental Psychology at York University (CPA and APA accredited). She completed her Master’s in the same program in 2019. Prior to this, Samantha obtained her Master’s degree in Developmental Psychopathology at Durham University in the UK and her Bachelor’s degree in Psychology at Queen’s University.

Samantha has received extensive training working with children and adolescents under the supervision of psychologists at both the hospital and out-patient clinic setting. At our clinic, Samantha provides psychoeducational assessments and therapy to children, adolescents, and their families under the direct supervision of Dr. Queenie Lo. Her approach to treatment involves integrating techniques from cognitive-behavioural, acceptance and commitment, dialectical behaviour, motivational interviewing, and psychodynamic therapies. She aims to create a warm, collaborative, and safe environment to her work with individuals and families with a wide range of concerns.

Samantha’s research interests focus on emotion regulation, interpersonal relationships, and mental health among adolescents and emerging adults. Her most recent work involved evaluating an innovative tool in promoting resilience among youth in foster care.

In her spare time, she enjoys spending time with her family, travelling, and doing yoga.

Dianna Scimeca, B.Sc., MA.

Psychometrist/Behavioural Therapist (Markham Location Only)

Dianna works under the direct supervision of psychologist Dr. Queenie Lo.

Dianna received her BA in Psychology at York University and her Masters in Psychology at University of Nevada Reno. Dianna is Board Certified Behaviour Analyst (BCBA) and has significant experience providing consultations and treatment to children and adolescents with ASD and other behavioural concerns using principle of Behavioural Analysis.  She has worked within the schools, community-based outpatient clinics, and private clinics.  She was also Teaching Instructor at Seneca College in the area of Autism and Behavioural Science.

Since 2013, she has joined the Psychology Department at Durham District School Board as Psychometrist providing psychoeducational assessments under supervision of Psychologists.  Dianna is in the process of registering with the College of Psychologists of Ontario as Psychological Associate.

Hannan Madamidola, B.Sc. (Hons)

Office Assistant

Hannan is the Office Assistant for the clinic. She graduated with a Honours Bachelors of Science from Western University. Hannan enjoys working with people and brings with her a number of wonderful skills to support the clinic’s intakes and daily operations.