Jadzia Jagiellowicz earned her PhD under the supervision of Elaine Aron and has been conducting scientific research on High Sensitivity (HSP) for the past 20 years. She is one of the authors of The Highly Sensitive Brain: Research, Assessment and Treatment of Sensory Processing Sensitivity (2020), a reference guide to all things HSP. She also provides information and support to individual HSP clients based on her extensive knowledge of the field. She lives in Quebec, Canada.