Modelling Valence and Arousal in Facebook Posts

22 Pages·2016·2.45 MB·English

Modelling Valence and Arousal
in Facebook Posts
LyleUngar
D.Preo¸tiuc-Pietro,H.A.Schwartz
G.Park,J.Eichsteadt,M.Kern,E.Shulman
PositivePsychologyCenter
UniversityofPennsylvania
16June2016
Motivation
DataSources
Productreviews Affectivestates
Opinionstowardsproducts, Feelingstowardsselfor
restaurants,events,etc. others.
Long,morestructured Short,lessstructured
Modelsofproductsentimentandemotionshouldbedifferent
Motivation
Modelsofemotion
DiscreteEmotions DimensionalModels
MostpopularinNLPareEkman’s Eachaffectivestateisa
sixemotions: anger,disgust,fear, combinationofreal-valued
joysadness,surprise components
Caucasian Facial Expressions of EmotionMatsumoto & Ekman - Japanese and MmTnvwaeoouleodsrnteoicnplped(ohR(epyoupusrseilsosaneelrdloni1egts9niimtc8tha0eel,nsPctyio)rssactnuenemmdr2sap:0rloe0xu5)s)al
Someemotionsdrivenbysimilar
words(hell,bad→sadness,fear,
anger)
Emotion Circumplex
Source: Jonker & Van der Merwe - Emotion episodes of Afrikaans-speaking employees in the workplace
Applications
Goal: Automatedlarge-scalepsychologicalstudies
• measuringtime-of-dayandday-of-weekmoodswings
• andwhatcausesthem
• mentalillnessdetection
• bipolar,schizophrenicbreaks...
• analysingmoviesandbooks
• andhowtheyvaryinemotioncontent
• correlatingwithexternaleffects
• e.g. weather,sportsgameoutcomes,...
Measuring Valence and Arousal
• Valence(orsentimentorpolarity)
• 1(verynegative)–5(neutral/objective)–9(verypositive)
• Arousal(orintensity)
• 1(neutral/objectivepost)–9(veryhighintensity)
Examples
Message V A
Is the one whoz GOing to Light Up your 7 8
Day!!!!!!!!!!!!
Blessedwithababyboytoday... 7.5 2
theboringlifeisback:(... 3 2.5
ISSUPERSTRESSEDANDITSJUSTTHESEC- 2.5 7
ONDMONTHOFSCHOOL..D:
Exampleofpostsannotatedwithaveragevalence(V)andarousal(A)
ratings.
Data Source
3120Facebookposts
Stratifiedby:
• Age(13-35)
• Gender(M/F)
Eachmessagefromadistinctuser
Allmessagesfromthesametimeinterval
Annotation
Twoannotators:
• psychologystudents
• receivedtraininginannotatingthesetraits,including
anchoring
• nodistractionsthatmayaffecttheymood(music,etc.)
Messagesareun-ratableiftheyarenotinEnglishorcontainno
cues
• 235messages(∼7.5%)
• CohensKappaκ=.93
Annotation Results
900 500
700
mber of posts500 mber of posts300
Nu300 Nu
100
100
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
Valence Arousal
Valence Arousal
Histogramsofaverageratingscores.
Valence–Arousal→r = 0.222
Valence–Arousal→r = 0.085(ignoringneutralposts)