Detecting Deception: Non-Verbal Cues or a Product of Trauma? | Sarah MacDonald | TEDxUAlberta

Is detecting a lie as simple as paying attention to the pitch of someone’s voice, or noting how much they fidget? Sarah Macdonald argues that such assumptions need to be critically questioned in the context of “high-stakes lies”, especially while considering the complexities of traumas and the accompanying changes in survivors’ memories. Though both non-verbal and behavioural cues have been researched to underlie deception, Sarah advocates for this knowledge to be used in further understanding or investigating truths instead of passing off judgements on one's credibility.

Dr. Sarah MacDonald is a Forensic Psychologist and published author who conducts research examining cognitive processes underlying investigative interview techniques, psychological-based investigative practices, deception detection/credibility assessment, and memory. She is certified in Advanced Cognitive Interviewing (British Police, UK) and has since taught this course (the first of it's kind in North America) to Canadian police officers in Major Crime who interview significant witnesses and victims of crime. Presently, Sarah works with the Sheldon Kennedy Child Advocacy Centre in Calgary as an Investigative Interviewer and works closely with the RCMP and Calgary Police on cases of child sexual abuse. She is a strong advocate for evidence-based, scientifically sound interview training programmes.

This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

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