Centre of Forensic Interviewing


Photo of Ms Ruth Marchant

Ms Ruth Marchant

  • Role Title: PhD Student
  • Address: St George's Building, 141 High Street, Portsmouth PO1 2HY
  • Telephone: 023 9284 3927
  • Email: ruth.marchant@port.ac.uk
  • Department: Institute of Criminal Justice Studies
  • Faculty: Faculty of Humanities and Social Sciences


I have worked in child protection for 25 years. My background is in psychology and I am a forensic interviewer and intermediary, enabling children to give evidence about serious crimes to the police and the courts. Most of my work is with very young children or children with communication impairments.  I have been directly involved in more than 600 forensic interviews or trials with children aged under six, children with communication impairments or children who are severely traumatised.

I am a founding director of Triangle; we work to enable the best evidence of children across the UK, and also teach, publish and consult on these issues.

My background is in direct work with children. Since 1985 I have specialised in work with very young children and children with complex communication needs. I have consulted with children on a wide range of issues and developed particular knowledge and expertise in evidentially careful communication.


  • 1982 BA (Hons) Developmental Psychology
  • 1984 - 2014 Non-directive Play; Counselling Skills in Paediatric Oncology; Hospital Play Techniques; Makaton sign language stages 1-9; BSL level 1; Derbyshire Language Scheme Assessors Course; Interviewing within Memorandum of Good Practice Guidance; Interviewing within Achieving Best Evidence Guidance; Witness Intermediary Training; Masterclass in Investigative Interviewing of Young Children; Advanced Certificate in Forensic Interviewing of Children.


I have taught and published widely on the evidence of very young children and disabled children. I have also led practice research that has enabled the creation of a range of communication aids, resources and teaching materials now in worldwide use.

I am working towards a PhD by prior publication under the supervision of Becky Milne. The research question that underlies all of my work is how best to enable young and disabled children to give accurate, complete and coherent evidence in the criminal and family justice systems.