Margaret Hills de Zárate is an art therapist and honorary senior research fellow at the Centre for Applied Social Sciences, Queen Margaret University, Edinburgh, the United Kingdom. Her most recent publication is Arts Therapies and the Mental Health of Children and Young People with Uwe Hermann, Heather M. Hunter, and Salvo Pitruzella. She is also the author of various chapters on cultural issues and migration in art and art therapy. Her research has been mainly conducted in Central and South America.

Diane Waller, OBE, is an emeritus professor of art psychotherapy at Goldsmiths University of London. She has also served as the honorary president of the British Association of Art Therapists, former council member (Health and Care Professions Council), and group analytic psychotherapist (UK Council for Psychotherapy). She is also the co-editor (with Sarah Scoble) of Routledge's International Research in the Arts Therapies series.

Claire Louise Vaculik (née Leyland) is an art therapist and gestalt psychotherapist. She served as the programme director of the MA in integrative arts psychotherapy at IATE/UEL for over a decade, an external examiner for two UK-based art therapy trainings, and a lead assessor for the UK Council for Psychotherapy. She was an associate editor of the International Journal of Art Therapy and is the current chair of the British Association of Art Therapists.