Lecture 3: Deception

Question 1

TenBrinke 2012

Answer 1

Methods: Missing person pleas
Results: Genuine pleaders: grief muscles contract more, longer duration
Deceivers: masking smiles

Question 2

Ekman and O’Sullivan 2006

Answer 2

Theory:
Facial expressions innate and difficult to inhibit.
Posed vs felt smiles vary on: morphology, timing, symmetry (posed less) and cohesion

Question 3

Mann et al 2004

Answer 3

Methods: Real police officers watched real police interviews
Results: Accuracy: Lies-66.16%, truth-63.16%
Significant correlations with perceived interview experience and use of stereotypical cues (neg)
Men significantly better at detecting truths
No relationship with confidence

Question 4

Warren, Schertler and Bull 2009

Answer 4

Methods: Truthful and deceptive responses to videos. Baseline (describe hobbies)
Results: Accuracy: Overall 50%, Emotional lies 64%, Non emotional lies 34%
Emotional lies correlated with SETT

Question 5

Ekman and Friesen 1974

Answer 5

Method: Female nurses describe pleasant or stressful film honestly or deceptively
Results: Observers more accurate from body
FACS trained- high accuracy from face alone

Question 6

Frank and Ekman 1997

Answer 6

Aim: To investigate deception in high stakes situations
Method: Mock theft and falsifying an opinion
Results: No gender differences
Decoders performance on the tasks significantly correlated
Microexpression recognition significantly correlated with overall accuracy

Question 7

Ekman and O’Sullivan 1991

Answer 7

Aim: To investigate deception detection rates in different populations 
Finings: Secret service 64.12
Polygraphers 55.67
Judges 56.73
Students 52.82
Most highly accurate under 40
Microexpressions significantly correlated with accuracy 
No gender diffs
Confidence not correlated