Management Committee

Mobirise
Dr. Vicky Fallon

Dr. Vicky Fallon is a Senior Lecturer in Perinatal Psychology specialising in psychometrics and measurement of perinatal mental health. Over the past decade, her work has focused on the development and validation of tools to assess perinatal anxiety and related outcomes, and on understanding how measurement shapes research, policy, and clinical care. She led the development of the Postpartum Specific Anxiety Scale (PSAS) and collaborates internationally to improve culturally responsive assessment in perinatal mental health. Her research aims to bridge the gap between lived experience, research evidence, and real-world practice to support equitable and meaningful care for families.

Mobirise
Dr. Sergio A. Silverio

Dr. Sergio A. Silverio is the Chief Investigator for the PSAS in Europe and The MENA Region, Principal Investigator of the PSAS-RSF-C, and co-supervises the students working on the PSAS. He holds two Masters degrees in Psychological Sciences (Clinical and Health Psychology) and Psychological and Psychiatric Anthropology, from the University of Liverpool and Brunel University London, respectively. He completed his PhD in Lifecourse Science Research at King’s College London. Sergio is a Charted Psychologist and internationally acclaimed qualitative research expert, and therefore focuses on the theoretical aspects of the PSAS, as well as the procedures for translation.

Mobirise
Prof. Paul Christiansen

Prof. Paul Christiansen is a Professor of Applied Statistics at the University of Liverpool. He has worked in a range of fields in Psychology and medicine publishing papers in addiction, appetite and obesity, forensic psychology, clinical psychology, health psychology and bowel disorders. He is particularly interested in psychometrics and has worked on creating reliable questionnaires for years, with the PSAS being one he has worked on developing for several years.

Mobirise
Semra Worrall

Semra Worrall is a Doctoral Academic Teacher and PhD student at the University of Liverpool. Semra is responsible for the ongoing management of the PSAS and all permissions relating to its use, nationally and internationally. Her research interests concern perinatal mental health, particularly in women who have given birth prematurely. Semra has adapted the PSAS for use in mothers of premature infants (PSAS-PTB) and those who have had infants admitted to the NICU (PSAS-NICU). Semra has and continues to collaborate on several PSAS-related projects to date, including assessing the acceptability of the PSAS for use as a clinical tool.

UK Researchers

Mobirise
Siân M. Davies

Sian Davies is a Chartered Psychologist working in both clinical and research settings specialising in physical/mental health and neurodiversity across the lifespan. Sian additionally holds an honorary appointment in the Department of Psychology at the University of Liverpool. Her research interests fall within women’s and children’s health. In 2020, she developed and validated a 16-item short-form research tool of the PSAS. She has published and continues to work on a number of PSAS-related projects as part of her role within the PSAS UK Working Group.

International Team

© Copyright 2025 Vicky Fallon. All Rights Reserved

Mobirise page builder - Click here