4. ““Man was given a tongue with whichMan was given a tongue with which
to speak and words to hide histo speak and words to hide his
thoughts.”thoughts.”
(Hungarian Proverb)(Hungarian Proverb)
5. Number of college students who admittedNumber of college students who admitted
lying to a potential sex partnerlying to a potential sex partner
92%92%
(Knox et al., 1993)(Knox et al., 1993)
6. Type of Sexual LiesType of Sexual Lies
Most frequent lie both sexes?Most frequent lie both sexes?
Number of previous sex partnersNumber of previous sex partners
MenMen I love youI love you
WomenWomen Sexually gratifiedSexually gratified
9. Obtaining Jobs: Types of LiesObtaining Jobs: Types of Lies
College degreesCollege degrees
Stretching employment periods to hideStretching employment periods to hide
unemploymentunemployment
Men: Played on college football teamMen: Played on college football team
Women: President of sororityWomen: President of sorority
10. AdvertisingAdvertising
““We’re conceived, born, and deceived.We’re conceived, born, and deceived.
By the time someone reaches the age ofBy the time someone reaches the age of
10, he’s pretty cynical.”10, he’s pretty cynical.”
(Jerry Della Femina, advertising executive(Jerry Della Femina, advertising executive
quoted in McLoughlin et al., 1987, p. 59)quoted in McLoughlin et al., 1987, p. 59)
11. Political LiesPolitical Lies
Lies to get electedLies to get elected
Lies to gain support for policyLies to gain support for policy
Lies to protect national securityLies to protect national security
Stupid liesStupid lies
13. PatientsPatients
Number with allergic asthma who liedNumber with allergic asthma who lied
to doctors about smokingto doctors about smoking
14%14%
(Squire et al., 1991)(Squire et al., 1991)
14. PatientsPatients
Number of psychiatrically hospitalizedNumber of psychiatrically hospitalized
patients who lied about using drugs?patients who lied about using drugs?
60%60%
(Blumberg et al., 1971)(Blumberg et al., 1971)
15. Dodgy ScientistsDodgy Scientists
Isaac NewtonIsaac Newton fudged datafudged data
Louis PasteurLouis Pasteur used another’s vaccineused another’s vaccine
Gregor MendelGregor Mendel fudged datafudged data
Charles DarwinCharles Darwin used others’ theoriesused others’ theories
without creditwithout credit
16. Question is not do they lieQuestion is not do they lie
ButBut
Why?Why?
How much?How much?
How well?How well?
17. Liars & Con MenLiars & Con Men
LiarsLiars Specific lie(s)Specific lie(s)
Con ManCon Man LiesLies
PersonaPersona
RelationshipRelationship
18. Ferdinand DemaraFerdinand Demara
Posed asPosed as
Physician in Royal Canadian NavyPhysician in Royal Canadian Navy
Removed a bullet within half an inchRemoved a bullet within half an inch
of the heartof the heart
Removed a lungRemoved a lung
19. Ferdinand DemaraFerdinand Demara
Posed asPosed as
TeacherTeacher
Ph.D. in psychologyPh.D. in psychology
College deanCollege dean
Assistant warden of a Texas prisonAssistant warden of a Texas prison
Joined and deserted from US army &Joined and deserted from US army &
navynavy
20. ““I am a superior sort of liar. I don’tI am a superior sort of liar. I don’t
tell any truth at all, so then my storytell any truth at all, so then my story
has unity of parts, a structuralhas unity of parts, a structural
integrity, and this sounds more likeintegrity, and this sounds more like
the truth than the truth itself.”the truth than the truth itself.”
(Con man Ferdinand Demara quoted in(Con man Ferdinand Demara quoted in
Crichton, 1968, p. 92)Crichton, 1968, p. 92)
26. Role of DeceptionRole of Deception
PracticalPractical
Part of the HighPart of the High
Part of the Double LifePart of the Double Life
Shame DrivenShame Driven
27. Gaze AversionGaze Aversion
““Even the guilty liar probably won’t avert hisEven the guilty liar probably won’t avert his
gaze much, since liars know that everyonegaze much, since liars know that everyone
expects to be able to detect deception inexpects to be able to detect deception in
this way. . . Amazingly, people continue tothis way. . . Amazingly, people continue to
be misled by liars skillful enough to notbe misled by liars skillful enough to not
avert their gaze.”avert their gaze.”
(Ekman, 1992, p. 141)(Ekman, 1992, p. 141)
28. ““At times there was a great amount ofAt times there was a great amount of
shame for being deceitful. At times thereshame for being deceitful. At times there
was a great amount of pride: well, I pulledwas a great amount of pride: well, I pulled
this one off again. You’re a good one.this one off again. You’re a good one.
You’re very capable of doing this. It worksYou’re very capable of doing this. It works
for you. There were times when little oldfor you. There were times when little old
ladies would pat me on the back and say,ladies would pat me on the back and say,
‘You’re one of the best young men that I‘You’re one of the best young men that I
ever have known.’ I would think back andever have known.’ I would think back and
think, ‘If you really knew me you wouldn’tthink, ‘If you really knew me you wouldn’t
say that.’”say that.’”
29. ““To begin with, how I felt about foolingTo begin with, how I felt about fooling
people is what’s really hard to describe. Ipeople is what’s really hard to describe. I
felt ashamed. For lack of a better word tofelt ashamed. For lack of a better word to
describe it. Because I knew these peopledescribe it. Because I knew these people
were trusting me. . . When I would lie towere trusting me. . . When I would lie to
them, to start with I felt a lot of shame.them, to start with I felt a lot of shame.
But eventually, I had lied so much to, theBut eventually, I had lied so much to, the
shame element was no longer there. Itshame element was no longer there. It
was just a matter of keeping my tailwas just a matter of keeping my tail
covered. Keeping everything covered up.”covered. Keeping everything covered up.”
30. PsychopathsPsychopaths
““There is agreement that neither guiltThere is agreement that neither guilt
about lying nor fear of being caughtabout lying nor fear of being caught
will cause a psychopath to makewill cause a psychopath to make
mistakes when he lies.”mistakes when he lies.”
(Ekman, 2009)(Ekman, 2009)
31. Feelings of Psychopaths When LyingFeelings of Psychopaths When Lying
ExcitementExcitement
Relief at being believedRelief at being believed
ContemptContempt
PridePride
32. 20 Years of Research on Lying20 Years of Research on Lying
• People rarely get above 60%People rarely get above 60%
accuracyaccuracy
• Some groups worse than chanceSome groups worse than chance
(Ekman, 1992)(Ekman, 1992)
34. Who Can’t Tell?Who Can’t Tell?
Customs inspectors vs. collegeCustoms inspectors vs. college
students)students)
(Kraut & Poe, 1980)(Kraut & Poe, 1980)
Federal law enforcement officers vsFederal law enforcement officers vs
studentsstudents
(DePaulo & Pfeifer, 1986)(DePaulo & Pfeifer, 1986)
Police officers no better than chancePolice officers no better than chance
(Kohnken, 1987)(Kohnken, 1987)
36. Who Can TellWho Can Tell
• Secret Service?Secret Service?
• Police selected as expertsPolice selected as experts
• Clinical psychologists taking courseClinical psychologists taking course
• Members of federal agencies takingMembers of federal agencies taking
coursecourse
Accurate in detecting lies, not truthAccurate in detecting lies, not truth
37. Top Lie DetectorsTop Lie Detectors
Very fewVery few
85% accuracy85% accuracy
(Ekman, 2009)(Ekman, 2009)
38. Can People Learn to Detect Lying?Can People Learn to Detect Lying?
Disguised smilingDisguised smiling
Lack of head movementLack of head movement
Increased rate of fidgetingIncreased rate of fidgeting
Increased pitchIncreased pitch
Reduced rate of speechReduced rate of speech
Pause fillers (“uh,” “er”)Pause fillers (“uh,” “er”)
Less congruent nonverbal behavior fromLess congruent nonverbal behavior from
the various communication channelsthe various communication channels
(Zuckerman & Driver, 1984)(Zuckerman & Driver, 1984)
39. Role of Training & ExperienceRole of Training & Experience
True StatementsTrue Statements
All groups more accurate with moreAll groups more accurate with more
experience, particularly with trainingexperience, particularly with training
and feedbackand feedback
Feedback less of a difference thanFeedback less of a difference than
expectedexpected
40. Federal law enforcement officersFederal law enforcement officers
More Confident Than College StudentsMore Confident Than College Students
No More AccurateNo More Accurate
(DePaulo & Pfeifer, 1986)(DePaulo & Pfeifer, 1986)
41. AccuracyAccuracy
What Didn’t Make a DifferenceWhat Didn’t Make a Difference
AgeAge
SexSex
Years of Job ExperienceYears of Job Experience
(Ekman, 1991)(Ekman, 1991)
43. Which Signs of DeceptionWhich Signs of Deception
Work?Work?
Signs the liar doesn’t know toSigns the liar doesn’t know to
fakefake
Signs the liar can’t fakeSigns the liar can’t fake
44. What Are You Detecting?What Are You Detecting?
Deception?Deception?
Emotional leakage?Emotional leakage?
45. ““There is no sign of deceit itself.”There is no sign of deceit itself.”
(Ekman, 2009,p. 80)(Ekman, 2009,p. 80)
46. Emotions Involved in LyingEmotions Involved in Lying
Fear of being caughtFear of being caught
Guilt about lyingGuilt about lying
Guilt about behaviorGuilt about behavior
Duping delightDuping delight
47. FearFear
Fear of not being believedFear of not being believed
Fear of being caughtFear of being caught
48. Channels of CommunicationChannels of Communication
FaceFace
WordsWords
Voice CharacteristicsVoice Characteristics
Body LanguageBody Language
59. AsymmetryAsymmetry
Voluntary ExpressionsVoluntary Expressions
Brow-lowering in anger stronger on leftBrow-lowering in anger stronger on left
Nose-wrinkling in disgust stronger onNose-wrinkling in disgust stronger on
rightright
Stretching of lips back towards ears inStretching of lips back towards ears in
fear are stronger on rightfear are stronger on right
66. EmblemsEmblems
Wave goodbyeWave goodbye
Thumbs upThumbs up
Thumbs downThumbs down
Come hereCome here
HitchhikingHitchhiking
PeacePeace
Crazy (circle ear)Crazy (circle ear)
PrayingPraying
SleepingSleeping
Middle fingerMiddle finger
67. Channels of CommunicationChannels of Communication
FaceFace
WordsWords
Voice CharacteristicsVoice Characteristics
Body LanguageBody Language
68. Detecting Deception: LanguageDetecting Deception: Language
Deception statements contain:Deception statements contain:
Negative statementsNegative statements
Irrelevant informationIrrelevant information
Over-generalized statementsOver-generalized statements
Less personally relevant informationLess personally relevant information
72. CommunicationCommunication
Body LanguageBody Language 65%65%
Verbal contentVerbal content 7%7%
Voice qualityVoice quality 12%12%
Mixture odors, chemicalMixture odors, chemical
changes, etc.changes, etc. 16%16%
(Walters, 1996)(Walters, 1996)
73. Nurse StudyNurse Study
96% accuracy96% accuracy
Voice Characteristics: Rise in PitchVoice Characteristics: Rise in Pitch
Face: Miserable SmilesFace: Miserable Smiles
74. Detecting DeceptionDetecting Deception
False SmilesFalse Smiles
No involvement of eyes or eyebrowNo involvement of eyes or eyebrow
More asymmetricalMore asymmetrical
Offset not smoothOffset not smooth
75. Science of SmilesScience of Smiles
False SmilesFalse Smiles
Fear SmilesFear Smiles
Contempt smilesContempt smiles
Dampened SmilesDampened Smiles
Miserable smilesMiserable smiles
Chaplin smileChaplin smile
76. Facial Action Coding SystemFacial Action Coding System
(FACS)(FACS)
44 Action Units44 Action Units
30 Contraction of Specific Muscles30 Contraction of Specific Muscles
E.g.., Frontalis, pars medialisE.g.., Frontalis, pars medialis
Inner Corner of EyebrowInner Corner of Eyebrow
RaisedRaised
13 Unspecified13 Unspecified
E.g.., Jaw ThrustE.g.., Jaw Thrust
7000 Combinations Observed7000 Combinations Observed
77. Comprehensive Coding SystemsComprehensive Coding Systems
for Emotional Recognitionfor Emotional Recognition
10 Hours of Coding Time Per10 Hours of Coding Time Per
Minute of BehaviorMinute of Behavior
(Ekman, 1992)(Ekman, 1992)
78. Computerized Analysis of FacialComputerized Analysis of Facial
ExpressionsExpressions
96.7% Accurate96.7% Accurate
(Tian et al.,2000)(Tian et al.,2000)
79. Pitt- CMU Au-Coded FacePitt- CMU Au-Coded Face
Expression DatabaseExpression Database
N = 210N = 210
69% Female; 31% Male69% Female; 31% Male
81% Euro-Americans81% Euro-Americans
13% Afro-American13% Afro-American
6% Other6% Other
Age 18 to 50Age 18 to 50
(Kanade et al., 2000)(Kanade et al., 2000)