Team Members

What is our philosophy?

Our philosophy is rooted in the sociology of childhood - a theoretical body of scholarship that emphasizes the significance of valuing children as ‘present beings’ or as individuals with their own skills, experiences, knowledge, and capacities to participate in decisions that affect them (James, 2011; James & Prout, 2015; Prout, 2005; Wyness, 2012; Qvortrup, 1994).

We see value in this sociological scholarship because it contrasts with more traditional developmental views of childhood that focuses on children as ‘future becomings’ as they grow into adults. However, this perspective often overlooks the significance of children’s present lives and their active roles in society today.

We believe that rooting our work in the sociology of childhood can help create a more inclusive understanding of childhood because it recognizes that children’s present and future experiences within specific contexts are valued in all matters affecting them.


Donna Koller, PhD @allkidsincluded

Dr. Donna Koller is a professor in the School of Early Childhood Studies at Toronto Metropolitan University in Toronto, Canada. She completed her graduate studies at the University of Missouri-Columbia and earned a doctorate in Child Development and Applied Psychology from the University of Toronto

Dr. Koller's program of research centers on understanding and illuminating children’s own experiences and perceptions. Her clinical experience spans three prominent children's hospitals in Canada and the United States, where she developed expertise in pediatric psychosocial care and advocacy for children's rights within healthcare settings.

In her role as an adjunct scientist at The Hospital for Sick Children (SickKids), Dr. Koller addressed critical issues such as children’s participation rights in decision-making and self-care, social inclusion for children with disabilities and chronic conditions, and children’s perspectives on medical errors. Her work has also explored the impact of COVID on children’s lives and their rights.

As a member of the International Society for Social Pediatrics and Child Health (ISSOP), Dr. Koller is guided by contemporary views of childhood and the ethical principles outlined in the United Nations Convention on the Rights of the Child (UNCRC) (1989). Her international consulting work has further advanced pediatric psychosocial care and research methodologies involving children.

Amarens Matthiesen, PhD, CCLS @amarensm

Amarens Matthiesen is a Postdoctoral Fellow in the School of Early Childhood Studies at Toronto Metropolitan University in Toronto, Canada, supervised by Dr. Donna Koller. She holds a PhD and MA in Child and Youth Care from the University of Victoria and an undergraduate MA in Psychology from the University of Dundee in Scotland, United Kingdom. She is also a Sessional Instructor in the School of Child, Youth, Family and Community Studies at the University of Victoria in British Columbia, Canada.

Amarens’ research and practice are strongly informed by the principle of children's right to participate in decision-making. This commitment was strongly integrated into her work as a Certified Child Life Specialist (CCLS) in children’s hospitals across Canada and continues to guide her research. Her research specifically focuses on centering the needs, wishes, and preferences of children, youth, and families in the delivery of healthcare. For example, her doctoral research explored children’s participation in healthcare decision-making in the context of pediatric hospitals in the Netherlands.

Having worked and lived in various countries, including the United Kingdom, Belgium, and the Netherlands, Amarens brings an enriched perspective to her work in psychosocial care and children's rights. These diverse experiences have exposed her to different ideas and approaches, broadening her understanding of what is possible in advancing children's rights and enhancing the quality of pediatric healthcare. Drawing on her varied experiences, Amarens has also been an invited guest speaker on issues related to psychosocial care and children’s rights across different countries and practice contexts.