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In the Eyes of the Beholder: In the Eyes of the Beholder: The Application of Eye-The Application of Eye-
tracking Methodology to tracking Methodology to Sexuality ResearchSexuality Research
Amy D. LykinsAmy D. LykinsMarta MeanaMarta Meana
University of Nevada, Las VegasUniversity of Nevada, Las VegasIASR 2005IASR 2005
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Introduction to Eye-tracking Introduction to Eye-tracking MethodologyMethodology
• Why we did the studyWhy we did the study
• What is eye-tracking?What is eye-tracking?
• Scene perceptionScene perception
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How Eye-trackers WorkHow Eye-trackers Work
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Purpose of the Current Purpose of the Current StudyStudy
• Are erotic images visually processed Are erotic images visually processed differently than non-erotic images?differently than non-erotic images?
• HypothesesHypotheses• Condition (erotic, non-erotic) X Scene Condition (erotic, non-erotic) X Scene
region (face, body, context) interactionregion (face, body, context) interaction• No main effect for ConditionNo main effect for Condition
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MethodsMethods
• ParticipantsParticipants• 20 men, 20 women, 20 men, 20 women,
college-agecollege-age• StimuliStimuli
• erotic and matched erotic and matched non-erotic imagesnon-erotic images
• ProcedureProcedure• 15 second exposure 15 second exposure
to 5 erotic, 5 non-to 5 erotic, 5 non-erotic imageserotic images
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Measures of InterestMeasures of Interest
• Total Number of Total Number of FixationsFixations
• First Gaze First Gaze Duration (ms)Duration (ms)
• Total Time (ms)Total Time (ms)
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Results—Total Number of Results—Total Number of FixationsFixations
• Interaction Interaction significantsignificant
• Both Both ♂♂ and ♀ looked at and ♀ looked at body more times in erotic body more times in erotic than non-erotic conditionthan non-erotic condition
• ♂ ♂ looked at face more in looked at face more in non-erotic conditionnon-erotic condition
• ♀ ♀ looked at context more looked at context more in non-erotic conditionin non-erotic condition
0
5
10
15
20
25
Non-erotic Erotic
Condition
Nu
mb
er o
f F
ixat
ion
s
Face
Body
Context
0
5
10
15
20
25
Non-erotic Erotic
Condition
Nu
mb
er o
f F
ixat
ion
s
Face
Body
Context
Male Participants
Female Participants
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Results—First Gaze Results—First Gaze DurationDuration
• Interaction not Interaction not significantsignificant
0
200
400
600
800
1000
1200
1400
Non-erotic Erotic
Condition
Fir
st G
aze
Du
rati
on
(m
s)
Face
Body
Context
0
200
400
600
800
1000
1200
1400
Non-erotic Erotic
Condition
Fir
st G
aze
Du
rati
on
(m
s)
Face
Body
Context
Male Participants
Female Participants
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Results—Total TimeResults—Total Time
• Interaction Interaction significantsignificant
• Both Both ♂♂ and ♀ looked at and ♀ looked at body more in erotic than body more in erotic than non-erotic conditionnon-erotic condition
• ♂ ♂ looked at face more in looked at face more in non-erotic conditionnon-erotic condition
• ♀ ♀ looked at context more looked at context more in non-erotic conditionin non-erotic condition
Male Participants
Female Participants
0
1000
2000
3000
4000
5000
6000
7000
8000
Non-erotic Erotic
Condition
To
tal T
ime
(ms)
Face
Body
Context
0
1000
2000
3000
4000
5000
6000
7000
8000
Non-erotic Erotic
Condition
To
tal T
ime
(ms)
Face
Body
Context
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ConclusionsConclusions
• Do people attend to erotic pictures Do people attend to erotic pictures differently than non-erotic pictures?differently than non-erotic pictures?
YES!YES!• Why not first gaze duration?Why not first gaze duration?• Eye-tracking can capture these Eye-tracking can capture these
differences in a quantitative, valid differences in a quantitative, valid mannermanner
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Future ApplicationsFuture Applications
• Gender differencesGender differences• Sexual arousalSexual arousal• Inner cognitions and appraisalsInner cognitions and appraisals• Distractability, memoryDistractability, memory• Reading of erotic storiesReading of erotic stories• Test on clinical populationsTest on clinical populations