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LIES and Micro
expression
• According to a research done by psychologists a
person speaks an average of 2 lies in a day.
• Humans are not biologically made to lie.
• Are lies harmful?

Did you know?
• Lets consider what happens when people lie.

NOW…..
• Motivational impairment effect
Look at this video
• Eyes and the hands are not coordinated in the same
direction
• They blink their eyes 2 seconds

• BUT why?

Common facts in the two
cases?
•
•
•
•
•
•

Increased pupil size
More nervous
Less eye contact
Press their lips together
Less relaxed posture
More blinking of eyes

Quick and easy method to
detect a lie
• Micro expressions

How do psychologists detect
lies?
• What is Micro expression?

• Involuntary contraction and relaxation of the
facial muscles.
Examples: 1. Smirks
2. Frowning
3. Smiles
4. Movement of eyelids and eyebrows

Micro expressions
• Micro expressions are better understood
using the FACS
• What is FACS?

• It stands for Facial Action Coding System
A Part of the List of Action Units and Action
Descriptors (with underlying facial muscles)
AU Number

FACS Name

Muscular Basis

0

Face

1

Inner Brow Raiser

Frontalis(pars medialis)

2

Outer Brow Raiser

Frontalis(pars lateralis)

4

Brow Lowerer

depressor glabellae, depressor supercilli,

5

Upper Lid Raiser

palpebrae superioris ,superior tarsal muscle

6

Cheek Raiser

orbicularis oculi(pars orbitalis)

7

Lid Tightener

orbicularis oculi(pars palpebralis)

8

Lips Toward Each Other orbicularis oris

9

Nose Wrinkler

levator labii suprioris alaeque nasi

10

Upper Lip Raiser

levator labii superioris, caput infraorbitalis

11

Nasolabial Deepener

zygomaticus minor.

12

Lip Corner Puller

zygomaticus major

Etc…
• Consider only emotion-related facial actions. Examples of these are:

Emotion

Action units

Happiness

6+12

Sadness

1+4+15

Surprise

1+2+5B+26

Fear

1+2+4+5+20+26

Anger

4+5+7+23

Disgust

9+15+16

Contempt

R12A+R14A
Study of Micro expressions

• Micro expressions can be difficult to recognize as they
last only 1/25 to 1/15 of a second
• A camera is used to distinguish distinct emotions
lies and micro-expression( my coms 1010 presentation)
• Study Micro expression by Using of photographs
lies and micro-expression( my coms 1010 presentation)
• Thank you all for you attention..

Any question will be
welcomed.

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lies and micro-expression( my coms 1010 presentation)

  • 2. • According to a research done by psychologists a person speaks an average of 2 lies in a day. • Humans are not biologically made to lie. • Are lies harmful? Did you know?
  • 3. • Lets consider what happens when people lie. NOW…..
  • 5. Look at this video
  • 6. • Eyes and the hands are not coordinated in the same direction • They blink their eyes 2 seconds • BUT why? Common facts in the two cases?
  • 7. • • • • • • Increased pupil size More nervous Less eye contact Press their lips together Less relaxed posture More blinking of eyes Quick and easy method to detect a lie
  • 8. • Micro expressions How do psychologists detect lies?
  • 9. • What is Micro expression? • Involuntary contraction and relaxation of the facial muscles. Examples: 1. Smirks 2. Frowning 3. Smiles 4. Movement of eyelids and eyebrows Micro expressions
  • 10. • Micro expressions are better understood using the FACS
  • 11. • What is FACS? • It stands for Facial Action Coding System
  • 12. A Part of the List of Action Units and Action Descriptors (with underlying facial muscles) AU Number FACS Name Muscular Basis 0 Face 1 Inner Brow Raiser Frontalis(pars medialis) 2 Outer Brow Raiser Frontalis(pars lateralis) 4 Brow Lowerer depressor glabellae, depressor supercilli, 5 Upper Lid Raiser palpebrae superioris ,superior tarsal muscle 6 Cheek Raiser orbicularis oculi(pars orbitalis) 7 Lid Tightener orbicularis oculi(pars palpebralis) 8 Lips Toward Each Other orbicularis oris 9 Nose Wrinkler levator labii suprioris alaeque nasi 10 Upper Lip Raiser levator labii superioris, caput infraorbitalis 11 Nasolabial Deepener zygomaticus minor. 12 Lip Corner Puller zygomaticus major Etc…
  • 13. • Consider only emotion-related facial actions. Examples of these are: Emotion Action units Happiness 6+12 Sadness 1+4+15 Surprise 1+2+5B+26 Fear 1+2+4+5+20+26 Anger 4+5+7+23 Disgust 9+15+16 Contempt R12A+R14A
  • 14. Study of Micro expressions • Micro expressions can be difficult to recognize as they last only 1/25 to 1/15 of a second • A camera is used to distinguish distinct emotions
  • 16. • Study Micro expression by Using of photographs
  • 18. • Thank you all for you attention.. Any question will be welcomed.