Deception analysis usingMouse tracking

Agrim Gupta

Basics

• People hesitate when lying• This shows up in their body movements• Polygraphs measure impulses• Mouse tracking measures the entire flow• This is much difficult to understand than a

simple polygraph• Mouse tracking is economical too

The experiment

• Two sets of 14-15 ‘obvious’ questions• Participants are made to sit in front of a

computer, made to answer with a mouse• One set is truthfully answered, the

participant lies in the other one• Participant is not told the objective of the

experiment until its done

MouseTracker Designer

MouseTracker Analyzer

Highlights

• Questions are randomized• Choice for truth-set or lie-set is random• Individual and Global calibration curve give

greater flexibility in analysis• Mouse tracking has better potential of being

accurate as people are comfortable with it

X-Deception Curve

Y-Deception Curve

Full Deception Curve (UF)

Full Deception Curve (F)

Drawbacks

• One-sided questions – software limitation• Test can be easily faked• Some questions may have doubtful answers• Different people have different mouse

movement expertise• Questions need more variety and need to be

more in number

Scope for Improvement

• A better software that allows more flexibility and is more stable

• Additional support from eye-tracking data• Clarity in questions needed• A standard desk with standard mouse

support can be arranged for• Questions should have randomized

placements of options

Thank You