1. Emotion dynamics Research Group Quantitative Psychology and Individual Differences University of Leuven, Belgium A network approach to emotion dynamics in dyads Peter Kuppens and Eva Ceulemans KU Leuven - University of Leuven, Belgium

2. Peter: -Emotion -Emotion dynamics -Emotion networks Eva: -How to obtain intraindividual network? -Building a dyadic network -Challenges Overview

3. Emotions Emotions play a large role in our livesEmotions play a large role in our lives joy anger sadness ?... colour our lives... colour our lives important determinants of many aspects of our lives:important determinants of many aspects of our lives: Influence our behavior, perception, memory, likes and dislikes, well- being, etc...

4. 1 important thing I want to say about emotions  Emotions are DYNAMIC phenomena Emotion dynamics One of most fundamental properties of our emotions is that they continuously change across time

5. 1 important thing I want to say about emotions  Emotions are DYNAMIC phenomena Emotion dynamics In fact: very reason why we have emotions in the first place lies in their dynamic nature Emotional and affective changes: -alert us of important events that are relevant to our well-being -motivate us to respond appropriately → emotions only have meaning BECAUSE they change across time (if not, useless or very disruptive) → time dynamic nature lies at very heart of emotions

6. EMOTION

8. METI  Time is fundamental aspect of emotions Understanding the nature of emotions implies studying their time dynamic nature

9. How can we understand the dynamic interplay between emotional states (or emotion components) across time?  One approach: network approach to emotion dynamics Emotion dynamics sad happy time

10. Network approach to emotion dynamics: Emotion system as network -Different emotional states (components) form nodes in network -Dynamic interrelations between emotions (components) captured as connections (edges) between nodes across time Emotion networks

11. Network approach to emotion dynamics: Emotion networks Bringmann et al., 2013, PlosONE

12. Network approach to emotion dynamics: Emotion networks Bringmann et al., 2014, PsychMedicine

13. Network approach to emotion dynamics: Emotion networks Pe et al., 2014, ClinPsychScience

14. Network approach to INTERPERSONAL emotion dynamics: Emotion networks

15. Network approach to INTERPERSONAL emotion dynamics: Emotion networks

16. Network approach to INTERPERSONAL emotion dynamics: Emotion networks

17. How to obtain intraindividual network? 1.Fit vector-autoregressive (VAR) model 2.Visualize regression slopes in network figure 3.Compute network characteristics Building a dyadic network Challenges 1.Network characteristics that capture dyadic interplay  Issue: which edges should one use? 2.Clustering dyads 3.What if number of variables grows large Mathematics of emotion networks

18. Predict each emotion at time point t on the basis of all emotions at time point t-1 Intraindividual network 1. Fit VAR-model interceptsslopes: auto-regressive effects cross-lagged effects innovations: part that cannot be predicted based on t-1

19. Predict each emotion at time point t on the basis of all emotions at time point t-1 Intraindividual network: 1. Fit VAR-model interceptsslopes: auto-regressive effects cross-lagged effects innovations: part that cannot be predicted based on t-1 edges of network

20. Intraindividual network: 2. Network figure Draw network, for instance, using R package Qgraph.

21. Intraindividual network: 3. Compute network characteristics Several measures available: betweenness, closeness, indegree, outdegree, density, …. All based on edges

22. Building a dyadic network

23. Predict each emotion of each partner at time point t on the basis of all emotions of all partners at time point t-1 Building a dyadic network

24. Predict each emotion of each partner at time point t on the basis of all emotions of all partners at time point t-1 Building a dyadic network how do partners influence themselves

25. Predict each emotion of each partner at time point t on the basis of all emotions of all partners at time point t-1 Building a dyadic network how do partners influence each other!!

26. Derive network characteristics that focus on dyadic interplay Issue: which edges should one use? 1.Well-known from standard regression analysis: slopes also reflect variances of variables 2.Slopes only reflect unique direct effects, what about shared variance Solutions: 1.Use standardized slopes 2.Use relative importance measures Challenges: 1. Network characteristics YtYt

27. If studies contain many dyads -separate networks per dyad too complex -overall network is parsimonious, but does not give insight into how dyads differ Solution: -cluster dyads based on their network -see poster of Laura Sels and Kirsten Bulteel Challenges: 2. Clustering dyads

28. Dyad  Number of variables times two! Solution: -Look for so-called community structure: variables that are strongly interrelated and have similar links to the other nodes -Replace these variables by a single node Challenges: 3. What if number of variables grows large?

29. EMOTION

31. EDN thank youthanks to: peter.kuppens@kuleuven.bepeter.kuppens@kuleuven.beLaura Bringmann eva.ceulemans@kuleuven.beeva.ceulemans@kuleuven.be Kirsten Bulteel Denny Borsboom Ian Gotlib Madeline Pe Laura Sels Francis Tuerlinckx