Kirstie Northfield, a researcher at the School of Psychology at Charles Sturt University, is dedicated to identifying who, besides adolescents themselves, can reliably assess the well-being of adolescents. Her research focuses on evaluating the accuracy of parents, teachers, and peers in making well-being support referrals and understanding the characteristics of a reliable judge of adolescent well-being. In addition to her research, Kirstie teaches positive psychology, emphasizing resilience and emotional intelligence. To maintain her own emotional balance, she enjoys running short distances, often using this activity to explore her favourite holiday destinations.