Stu Dunn
Stu Dunn
Dr. Paul Ekman
Micro Expressions
Body Language
SDL Behavioural Science Consultancy
StatisticsSDL helps our clients to understand non-verbal communication and to avoid deception. We do this by providing online courses, training and specialist advice in areas of behaviour, emotional analysis and deception detection.

"Encouraging honest communication in business, personal and family interactions through education."

SDL's Mission Statement: To be the worldwide leader in consulting and training in the area of facial expressions, non verbal behaviour and deception detection for both public and private sectors.

Our Clientele: SDL has worked with people from New Zealand, Australia, United States, United Kingdom, India, Canada, Germany, Afghanistan, Portugal, Poland, Switzerland, Macedonia and Sri Lanka so far.

To view SDL's Online and 2-Day training and consulting services, please visit the services page.

SDL is New Zealand's first Facial Action Coding System (FACS) Certified Consulting.

To read more about Stu's book; True Lies: A Guide to Reading Faces, Interpreting Body Language and Detecting Deception in the Real World, click here.


Guideline to Catching Liars by Examining Nonverbal and Verbal Behaviour - Observational Guidelines (2): Cues to deceit are most likely to occur when liars experience emotions or cognitive load, or attempt to control themselves. The act of lying itself doesn't affect somebody's nonverbal behaviour or speech - the liar must experience feelings of guilt (deception guilt) or fear (detection apprehension), or should be excited about the possibility of fooling someone (duping delight). In low-stake situations, lairs often don't experience these emotions, making lie detection very difficult. In high-stake situations being disbelieved may have serious consequences for the liar, which makes it more likely that liars will experience emotions such as fear or guilt.
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