SINDY R. SUMTER, PHD ACADEMIC AND RESEARCH APPOINTMENTS ASSISTANT PROFESSOR* AT THE AMSTERDAM SCHOOL OF COMMUNICATION SCIENCE, UNIVERSITY OF
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Updated July 2021
Sindy R. Sumter, PhD
University of Amsterdam
Department of Communication Science
The Amsterdam School of Communication Research (ASCoR)
Center for Research on Children, Adolescents, and the Media (CcaM)
ACADEMIC AND RESEARCH APPOINTMENTS
Assistant Professor* at the Amsterdam School of Communication Science, University of
Amsterdam, from March 2013 to present (60% teaching, 40% research).
* Qualified academic lecturer (BKO, June 2012)
Post-Doctoral Researcher at the Amsterdam School of Communication Science, University
of Amsterdam, January 2010 – March 2013
Post-Doctoral Researcher at the Developmental Psychology Unit, Leiden University, October
2009 – January 2010
Lecturer (0.2fte) at the Developmental Psychology Unit, Leiden University, October 2004 –
October 2009
Research Assistant at Macmillan Cancer Support (formerly known as CancerBACUP),
September 2003 – September 2004.
EDUCATION
Institute of Psychology, Developmental Psychology Unit, Leiden University, the Netherlands
PhD, Developmental Psychology, March 2010
Doctoral dissertation: Growing up to be fearful? Social evaluative fears during
adolescence. Available at https://openaccess.leidenuniv.nl/handle/1887/15050.
Goldsmiths College, University of London, United Kingdom
Master of Arts in Culture, Science and Technology (Department of Media and
Communications), September 2004
VU University Amsterdam, The Netherlands
Bachelor and Master of Science in Social Psychology, August 2002
Goldsmiths College, University of London, United Kingdom
Socrates/Erasmus student at the Anthropology department, January – June 2001
1|PageUpdated July 2021
PROFESSIONALIZATION
Workshop: “How to encourage contact among diverse groups of students (May 2021)
Interactive webinar organized as a part of the TICKET Staff Training Week, led by Guido
de Wilde.
Course: Diversity and Inclusion (March 2021)
This four sessions course taught at the Digital Society School (University of Applied
Sciences, Amsterdam) by Dr Sobhi Khatib provided a general introduction to Diversity
and Inclusion at the workplace.
Workshop: What’s culture got to do with it? (March 2021)
This workshop by Michael Boiger addressed the needs of the international classroom.
Workshop: A good test - design and key features (June 2020)
The workshop on best practices in assessment was taught by Silke Van Beekum – Reflect
Academy and offered through UvA’s Teaching and Learning Center.
Event: ABC-Workshop by ICTO (June 2018)
The workshop, developed by University College London, stimulates lecturers to think
about opportunities to implement blended learning in their education and reorganize their
courses accordingly (workshop used to redesign MA specialization seminar).
Event: UvA Annual Education Day: student engagement in a global context (May 2018)
Organized by the University of Amsterdam to facilitate knowledge-sharing for everyone
involved in education. Focus on the international classroom.
Workshop: Mastering Discussions by Dr Mariska Knol (April 2018)
Organized by FMG Knowledge Sharing Matchmakers, University of Amsterdam
Workshop: Designing MC Exams led by testing-expert Silverster Draaijer (September 2017)
Organized by the College of Communication Science, University of Amsterdam
Workshop: Designing strategies for interdisciplinary teaching and learning (April 2017)
Organized by the ISS, University of Amsterdam
Workshop: Case Teaching led by Prof. Kamran Kashani (18-19 January 2016)
Organized by the Case Centre, location Erasmus University, Rotterdam
2|PageUpdated July 2021
TEACHING
Courses, University of Amsterdam, Communication Science
Topic Always Connected: Key insights in youth, media & technology (undergraduate course)
Communicatie Advies en Onderzoek in de Praktijk (3rd year undergraduate)
Tech for Good: Responsible Technology in the Digital Society (graduate level course)
Clashing Views on Media Entertainment (graduate level course)
Clashing Views on Youth and the Media (graduate level course)
Youth as Media Consumers (graduate level course)
Research Methods Tailored to the Thesis (graduate level course)
Tutor Research Master Students - Entertainment Communication/ Youth and Media track
Master Thesis Preparation Course (graduate level course)
Courses, Leiden University, Developmental Psychology
Introduction to Developmental Psychology (1st year undergraduate)
Advanced Psycho-diagnostics (graduate level course)
Social Anxiety Master Class (graduate level course)
Dutch Sentence Completion Task for Youth (ZALC) course [External course organized by the
RINO group for Psychological Testing Assistants] (post graduate level)
Bachelor Projects (research projects resulting in individual theses; 3rd year undergraduate)
Master Thesis Supervision (graduate level)
3|PageUpdated July 2021
RESEARCH LINE STATEMENT: HappY Youth
The role of digital media in the socio-emotional lives of tweens, teens and emerging
adults is at the heart of my research. In a hyperconnected world where media and technology are
ubiquitous, it will be vital to understand how young people shape and are shaped by the digital
society. I want to address how media and technology can contribute to positive youth
development, in a way that the opportunities outweigh the risks. For this we need theoretical
models that reflect specifically on the unique – sometimes hidden – affordances of digital media,
while at the same time acknowledging individual differences in susceptibility to the influence of
these affordances. To answer these questions, my research includes cross-sectional, longitudinal,
and experimental studies, and when necessary digital methods to more accurately capture the
interplay between technology and socio-emotional functioning.
JOURNAL PUBLICATIONS
Sumter, S.R., Cingel, D. & Hollander, L. (2021). Navigating a muscular and sexualized
Instagram feed: An experimental study examining how Instagram affects both
heterosexual and non-heterosexual men’s body image Psychology of Popular Media.
Lemmens, J.S., Simon, M., & Sumter, S.R. (2021) Fear and Loathing in VR: The emotional and
physiological effects of immersive games. Virtual Reality (2021).
https://doi.org/10.1007/s10055-021-00555-w
de Vries, D.A., Sumter, S.R., Notten, N.J.W.R., & Rozendaal, E. (2020). De spiegel van de
sociale media: Een exploratieve studie naar de online zelfpresentatie van tweens.
Tijdschrift voor de Communicatie Wetenschap, 4.
Cingel, D., Sumter, S.R., & Jansen, M. (2020). How does she do it? An experimental study of
the pro- and antisocial effects of watching superhero content among late adolescents.
Journal of Broadcasting & Electronic Media, 64 (3), 459-477.
Miers, A. C., Sumter, S. R., Clark, D.M., & Leigh, E. (2020). Interpretation bias in online and
4|PageUpdated July 2021
offline social environments and associations with social anxiety, peer victimization, and
avoidance behavior. Cognitive Therapy and Research, 44, 820–833.
Scheurs, L., Vandenbosch, L., & Sumter, S.R. (2020). A Prototype Willingness Approach to the
Relation between Geo-Social Dating Apps and Willingness to Sext with Dating App
Matches. Archives of Sexual Behavior, 49, 1133–1145.
Cingel, D., Sumter, S.R., Mann, S. & Stoeten, E. (2020). Can television help to decrease
stigmatization among young children? The role of Theory of Mind and general and
explicit inserts. Media Psychology, 23, 342-364
van der Schuur, W., Baumgartner, S.E., Sumter, S.R., & Valkenburg, P.M. (2020). Exploring
the Long-Term Relationship between Academic-Media Multitasking and Adolescents’
Academic Achievement. Accepted for publication New Media and Society, 22, 140-158.
van der Schuur, W.A., Baumgartner, S.E. & Sumter, S.R. (2019). Sociale media gebruik, sociale
media stress en slaap: cross-sectionele en longitudinale verbanden tijdens de adolescentie
Kind & Adolescent, 40: 157. https://doi.org/10.1007/s12453-019-00206-7
Sumter, S.R., & Vandenbosch, L (2019). Dating gone mobile: demographic and personality
correlates of dating app use among emerging adults. New Media and Society. 21(3) 655–
673.
Cingel, D., Sumter, S.R., & van de Leur, J. (2019). The role of social context during television
viewing on children’s moral judgments about social exclusion and stigmatization of
others. Media Psychology, 22, 133-151.
van der Schuur, W., Baumgartner, S.E., & Sumter, S.R. (2019). Social Media Use, Social Media
Stress, and Sleep: Examining Cross-Sectional and Longitudinal Relationships in
Adolescents. [Special Issue]. Health Communication, 34(5), 552-559
Sumter, S.R., Cingel. D., & Anthonis, D. (2018). “To be able to change, you have to take risks
#fitspo”: Exploring correlates of fitspirational social media use among young women.
Telematics and Informatics, 35, 1166-1175
van der Schuur, W, Baumgartner, S.E., Sumter, S.R., & Valkenburg, P.M. (2018). Media
Multitasking and Sleep Problems: A Longitudinal Study Among Adolescents. Computers
in Human Behavior, 81, 316-324.
Baumgartner, S.E. & Sumter, S.R. (2017). Dealing With Media Distractions: An Observational
5|PageUpdated July 2021
Study of Computer-Based Multitasking Among Children and Adults. Journal of Children
and the Media, 11(3), 295-313.
Sumter, S.R., Vandenbosch, L., & Ligtenberg, L. (2017). Love me Tinder: untangling the
motivations of emerging adults to use Tinder. Telematics and Informatics, 34 (1), 67–78.
Sumter, S.R., & Baumgartner, S.E. (2016). Somatic complaints and Peer victimization.
European Journal of Developmental Psychology. Accepted for publication.
Bos, E., van de, Rooij, M., Van, Sumter, S.R., & Westenberg, P.M. (2016). Continued
Development of Recursive Thinking in Adolescence: Longitudinal Analyses with a
Revised Recursive Thinking Test. Cognitive Development, 37, 28–41.
Schuur, W, van der, Baumgartner, S.E., Sumter, S.R., & Valkenburg, P.M. (2015). The
Consequences of Media Multitasking for Youth: A Research Synthesis. Computers in
Human Behavior, 53, 204-215.
Baumgartner, S.E., Sumter, S.R., Peter, J., & Valkenburg, P.M. (2015). Sexual Self-
Presentation on Social Network Sites: Who Does it and how is it Perceived? Computers in
Human Behavior, 50, 91-100.
Sumter, S.R., Valkenburg, P.M., Baumgartner, S.E., Peter, J., & van der Hof, S. (2015).
Development and validation of the Multidimensional Offline and Online Peer
Victimization Scale. Computers in Human Behavior, 46, 114-122.
Baumgartner, S.E., Sumter, S.R., Peter, J., Valkenburg, P.M., & Livingstone, S. (2014). Does
country context matter? Investigating the predictors of teen sexting across Europe.
Computers in Human Behavior, 34, 157-164.
Sumter, S.R., Valkenburg, P.M., & Peter, J. (2013). Perceptions of Love across the Lifespan:
Differences in Passion, Intimacy, and Commitment. International Journal of Behavioral
Development, 37, 417-427.
Baumgartner, S.E., Sumter, S.R., Valkenburg, P.M., & Peter, J. (2012). Identifying Teens at
Risk: Developmental Pathways of Online and Offline Sexual Risk Behaviour. Pediatrics,
130, e1489-e1496.
Sumter, S.R., Baumgartner, S.E., Valkenburg, P.M., & Peter, J. (2012). Developmental
trajectories of peer victimization: offline and online experiences during adolescence.
Journal of Adolescent Health, 50, 607-613.
Miers, A.C., Blöte, A.W., Sumter, S.R., Kallen, V.L., & Westenberg, P.M. (2011). Subjective
6|PageUpdated July 2021
and objective arousal correspondence and the role of self-monitoring processes in high
and low socially anxious youth. Journal of Experimental Psychopathology, 2, 531-550.
Valkenburg, P. M., Sumter, S.R. & Peter, J. (2011). Gender differences in online and offline
self-disclosure. British Journal of Developmental Psychology, 29, 253-269.
Sumter, S.R., Bokhorst, C.L., Miers, A.C., Van Pelt, J., & Westenberg, P.M. (2010). Age and
puberty differences in stress responses during a public speaking task: Do adolescents
grow more sensitive to social evaluation? Psychoneuroendocrinology, 35, 1510-1516.
Bokhorst, C.L., Sumter, S.R., & Westenberg, P.M. (2009). Social support from parents, friends,
classmates, and teachers in children and adolescents aged 9 to 18 years: Who is perceived
as most supportive? Social Development, 19, 417 - 426.
Westenberg, P.M., Bokhorst, C.L., Miers, A.C., Sumter, S.R., Kallen, V.L., Van Pelt, J., &
Blöte, A.W. (2009). A prepared speech in front of a pre-recorded audience: Subjective,
physiological, and neuroendocrine responses to the Leiden Public Speaking Task.
Biological Psychology, 82, 116-124.
Sumter, S.R., Bokhorst, C.L., Steinberg, L., & Westenberg, P.M. (2009). Social fears during
adolescence: is there an increase in distress and avoidance? Journal of Anxiety Disorders,
23, 897-903.
Sumter, S.R., Bokhorst, C.L., Steinberg, L., & Westenberg, P.M. (2009). The developmental
pattern of resistance to peer influence in adolescence: Will the teenager ever be able to
resist? Journal of Adolescence, 32, 1009-1021.
Sumter, S.R., Bokhorst, C.L., & Westenberg, P.M. (2008). The robustness of the factor
structure of the self-restraint scale: what does self-restraint encompass? Journal of
Research in Personality, 42, 1082-1087.
van Dijk, W. W., Danner, U., Nieweg, M., & Sumter, S.R. (2003). Positive-negative asymmetry
in the evaluation of trivial stimuli. The Journal of Social Psychology, 143, 783-784.
Sumter, S.R., Nieweg, M., Danner, U.N. & van Dijk, W.W. (2001). De invloed van de positief-
negatief asymmetrie op de evaluatie van irrelevante stimuli, in Fundamentele Sociale
Psychologie (deel 15), Diederik A. Stapel et al (eds). Eburon.
7|PageUpdated July 2021
OTHER PUBLICATIONS
Sumter, S.R., Bokhorst, C.L., & Westenberg, P.M. (2016). Resistance and Conformity. In R.J.
Levesque (Ed.), Encyclopedia of Adolescence. New York: Springer. doi:10.1007/978-3-
319-32132-5_327-2 [updated entry]
Sumter, S.R., Bokhorst, C.L., & Westenberg, P.M. (2012). Resistance and Conformity. In R.J.
Levesque (Ed.), Encyclopedia of Adolescence. New York: Springer.
CONFERENCE PRESENTATIONS
Baumgartner, S.E. Sumter, S.R., Petkevic , V., & Wiradhany, W. (2021). Presenting a
Novel Data Collection and Automated Processing Approach for iOS Smartphone Data.
Paper presented at the Virtual 71st Annual ICA Conference, 27-31 May 2021.
Vranken, I., Sumter, S.R., & Vandenbosch, L. (2021). Dating Applications and
Users’ Intrinsic and Extrinsic Mate Values: A Multi-method Study. Paper presented at the
Virtual 71st Annual ICA Conference, 27-31 May 2021.
Vranken, I., Vandenbosch, L. & Sumter, S.R. (2020). Sexualization on dating apps? Unraveling
the interrelations between dating app use, appearance monitoring and users’ well-being.
Poster presented virtually at 19th General Meeting of the European Association of Social
Psychology, Krakow, Poland.
Taylor, L., Cingel, D., & Sumter, S.R. (2020). Instagram Filtering and Female Body Image.
Paper presented at the 70th Annual International Communication Association Conference,
Virtual Edition.
Baumgartner, S.E. & Sumter, S.R. (2020). Tracking smartphone use and sleep (Panel: Open
Science meets Digital Methods: Match Made In Heaven or Mutually Exclusive?). Paper
presented at Etmaal van de Communicatiewetenschap, 2020, Amsterdam, The
Netherlands.
Mollen, S., Sumter, S.R., van der Waal, N., Kwakman, P., & van der Laan, N. (2020). The
8|PageUpdated July 2021
effects of virtual compared to real eating companion on unhealthy food intake. Paper
presented at Etmaal van de Communicatiewetenschap, 2020, Amsterdam, The
Netherlands.
Sumter, S.R., Gilbert, A., & Habtemariam, S. (2020). Ready to touch? Perspectives, barriers
and opportunities of social touch technology in the context of long-distance relationships.
Paper presented at Etmaal van de Communicatiewetenschap, 2020, Amsterdam, The
Netherlands.
Vranken, I., Vandenbosch, L., & Sumter, S.R. (2020). Swiping to find your perfect mate on
dating apps? Gender differences in the presentation of desirable mate values on Tinder.
Paper presented at Etmaal van de Communicatiewetenschap, 2020, Amsterdam, The
Netherlands.
Sumter, S.R., Gilbert, A., & Habtemariam, S. (2019). Ready to touch? Perspectives, barriers
and opportunities of social touch technology in the context of long-distance relationships.
Paper presented at 6th bi-annual meeting of the Interpersonal Communication and Social
Interaction Division of ECREA. Tilburg, The Netherlands.
Mollen, S., van der Laan, N., & Sumter, S.R. (2019). The effects of virtual compared to real
eating companions on unhealthy food intake. Paper presented at 33rd Annual Conference
of the European Health Psychology Society. Dubrovnik, Croatia.
Cingel, D., Sumter, S.R., & Stoeten, E. (2019). Princess Sophia: Does theory of mind
moderate the effect of prosocial television on preschooler’s prosocial attitudes? Paper
presented at ICA 2019 Washington DC
Cingel, D., & Sumter, S.R. (2019). How does she do it? An experimental study of the
pro- and antisocial effects of watching superhero content among late adolescents. Paper
presented at ICA 2019 Washington DC
9|PageUpdated July 2021
Sumter, S.R. (2018). Dating gone mobile: Demographic and Personality-Based Correlates of
Using Smartphone-Based Dating Applications Among Emerging Adults. Paper presented
at the annual conference of the International Communication Association 2018, Prague,
Czech Republic.
Schreurs L., & Sumter S.R. (2018). Emerging Adults’ Use of Online Dating Apps and Their
Willingness to Sext with Strangers. Paper presented at the annual conference of the
International Communication Association 2018, Prague, Czech Republic.
Lemmens, J.S., & Sumter, S.R. (2018). Fear and loathing in VR: The effects of immersive
gaming on fear, aggravation and enjoyment. Paper presented at the annual conference
of the International Communication Association 2018, Prague, Czech Republic.
Schreurs L., Vandenbosch L., Sumter S. (2018). Disentangling the Relationships between Geo-
Social Dating Apps, Peer Norms, and Casual and Committed Sexual Relationships. Paper
presented at the annual conference of the International Communication Association 2018,
Prague, Czech Republic.
Cingel, D. & Sumter, S.R. (2018). The effect of Instagram filter level and social context on
young women’s body image. Paper presented at the annual conference of the
International Communication Association 2018, Prague, Czech Republic.
Vandenbosch L., Sumter S.R., & Schreurs L. (2018). Online Dating Apps and Willingness to
Sext: The Explanatory Role of the Prototype/Willingness Model. Paper presented at the
Etmaal van de Communicatiewetenschap, 2018 Ghent, Belgium.
Schreurs L., Vandenbosch L., & Sumter S. (2018). Are Tinder, Grindr and other geo-social
dating applications facilitating both hookups and romantic relationships? A cross-
sectional study on emerging adults’ casual and committed sexual relationships with
dating app matches. Etmaal van de communicatiewetenschap, 2018, Ghent, Belgium.
Lemmens, J.S. & Sumter, S.R. (2018). Fear and loathing in VR: The effects of immersive
10 | P a g eUpdated July 2021
gaming on fear, aggravation and enjoyment. Etmaal van de Communicatiewetenschap,
2018, Ghent, Belgium.
Cingel, D. & Sumter, S.R. (2017, April). Does the social context of children's prosocial
television viewing influence judgments about exclusion? Poster presented at SRCD
Biennial Meeting April 6-8, 2017, Austin, Texas, USA.
Miers, A. C., & Sumter, S. R. (2016, September). Offline and Online Interpretation Bias: Intra-
and Interpersonal correlates in Emerging Adults. Paper presented at the 15th Biennial
Meeting of the European Association for Research on Adolescence, Cadiz, Spain.
Sumter, S. R., Miers, A. C., & Baumgartner, S. E. (2016, September). The Sunny and Dark side
of Social Media: Behavioral and Emotional correlates of Feedback among Dutch college
students. Paper presented at the 15th Biennial Meeting of the European Association for
Research on Adolescence, Cadiz, Spain.
Sumter, S.R. (2016). Love me Tinder: untangling emerging adults’ motivations for using the
dating application Tinder. Poster presented at the annual conference of the International
Communication Association 2016, Fukuoka, Japan.
Van der Schuur, W.A., Baumgartner, S.E., Sumter, S.R., & Valkenburg, P. M. (2016). Media
Multitasking and Sleep Problems: A Longitudinal Study among Adolescents. Paper
presented at the annual conference for the International Communication Association 2016,
Fukuoka, Japan.
Van der Schuur, W.A., Baumgartner, S.E., Sumter, S.R., & Valkenburg, P. M. (2015). The
Consequences of Media Multitasking for Youth: A Research Synthesis. Presented at the
Etmaal van de Communicatiewetenschap 2015, Antwerp, Belgium.
Van der Schuur, W. A., Sumter, S.R., Baumgartner, S. E., & Valkenburg, P. M. (2015). The
Relationship between Media Multitasking and Academic Achievement. Presented at the
Etmaal van de Communicatiewetenschap 2015, Antwerp, Belgium.
Van der Schuur, W. A., Baumgartner, S. E., Sumter, S. R., & Valkenburg, P. M. (2015). The
Consequences of Media Multitasking for Youth: A Review. Presented at the annual
conference of the International Communication Association 2015, San Juan, Puerto Rico.
Van der Schuur, W. A., Sumter, S. R., & Baumgartner, S. E., (2015). The Relationship Between
Media Multitasking and Academic Achievement. Presented at the annual conference of
the International Communication Association 2015, San Juan, Puerto Rico.
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Rodríguez Hidalgo, C., Sumter, S.R., Anschutz, D., & Smith, E. (2014). When sharing
becomes excessive: exploring the relationship between oversharing on Facebook and
users’ intention to leave the site. Paper presented at Sharing: A keyword for the digital
age Preconference of International Communication Association (ICA), Seattle, US.
Sumter, S.R., Baumgartner, S., & Valkenburg, P.M. (2014). Do thoughts make a difference?
The relationship between online and offline peer victimization and social anxiety. Paper
presented at Etmaal van de Communicatiewetenschap 2014, Wageningen.
Sumter, S.R., Baumgartner, S., Valkenburg, P.M., & Peter, J. (2013). The role of
interpretation biases in online and offline peer victimization. Paper presented at the 16th
European Conference Developmental Psychology (ECDP), Lausanne, Switzerland.
Baumgartner, S. E., Sumter, S. R., Peter, J., Valkenburg, P., & Livingstone, S. (2013, February).
Investigating the predictors of teen sexting across Europe. Paper presented at the Etmaal
van de Communicatiewetenschap 2013, Rotterdam, the Netherlands.
Van den Bos, E.J., de Rooij, M., Miers, A.C., Sumter, S.R., & Westenberg, P.M. (2013, April).
Adolescent development of physiological responses to social evaluation: Effects of
puberty and cognitive development on cortisol and alpha-amylase. Paper presented at
Biennial Meeting of the Society for Research in Child Development (SRCD), Seattle, US.
Sumter, S.R., Baumgartner, S.E., Van der Hof, S., Peter, J., & Valkenburg, P. (2012,
September). Creating a multidimensional scale for offline and online peer victimization.
Poster presented at the 17th Annual CyberPsychology and CyberTherapy Conference
(CYBER17), Brussels, Belgium.
Sumter, S.R., Baumgartner, S.E., Valkenburg, P.M., & Peter, J. (2012, May). Developmental
trajectories of peer victimization: Offline and online experiences during adolescence.
Paper presented at the annual Conference of the International Communication Association
(ICA), Phoenix, US.
Baumgartner, S.E., Sumter, S.R., Peter, J., & Valkenburg, P.M. (2012, May). The development
of adolescents’ online sexual risk behavior and its relationship to negative online
experiences. Paper presented at the annual Conference of the International
Communication Association (ICA), Phoenix, US.
Baumgartner, S.E., Sumter, S.R., Peter, J., & Valkenburg, P.M. (2012, October). Online privacy
12 | P a g eUpdated July 2021
in adolescence and adulthood. Paper presented at the Amsterdam Privacy Conference,
Amsterdam, The Netherlands.
Sumter, S.R., Baumgartner, S. E., Van der Hof, S., Peter, J., & Valkenburg, P.M. (2011,
September). Creating a multidimensional scale for offline and online peer victimization.
Paper presented at the EU Kids Online Conference, London, UK.
Baumgartner, S.E., Sumter, S.R., Peter, J., & Valkenburg, P.M. (2011, September). Adolescents’
online sexual risk behavior and its relationship to online victimization experiences. Paper
presented at the EU Kids Online Conference, London, UK.
Sumter, S.R. (2011). Sociale gevolgen van internet: van plezier maken tot pesten. Presentation
during the award session of the dr. Hendrik Müller award to prof. dr. Patti Valkenburg.
Koninklijke Nederlandse Akademie van de Wetenschap (KNAW), Amsterdam, The
Netherlands.
Sumter, S.R., Baumgartner, S., Valkenburg, P.M., & Peter, J. (2011, August). Development and
effect of offline and online peer victimization during adolescence: a group based
modelling approach. Paper in symposium at the 15th European Conference
Developmental Psychology (ECDP), Bergen, Norway.
Baumgartner, S.E., Sumter, S.R., Peter, J., & Valkenburg, P.M. (2011, August). The
developmental relationship between online and offline sexual risk behaviour. Poster
accepted for the 15th European Conference on Developmental Psychology (ECDP),
Bergen, Norway.
Sumter, S.R. (2011, Maart). Youth and Social Media. Symposium Youth, Media and Parenting,
University of Amsterdam: Amsterdam, the Netherlands.
Baumgartner, S.E., Sumter, S.R., Peter, J., & Valkenburg, P.M. (2011, April). Risikoverhalten
im Internet: Entwicklungsverläufe von Jugendlichen. Paper presented at the annual
conference of the Swiss Association of Communication and Media Research, Basel,
Switzerland.
Baumgartner, S. E., Sumter, S.R., Peter, J., & Valkenburg, P. M. (2011, January).Developmental
trajectories of online and offline sexual risk behavior: a group-based modeling approach.
Paper presented at the ETMAAL van de Communicatiewetenschap, Enschede, The
Netherlands.
Westenberg, P.M., Sumter, S.R., Miers, A.C., Bokhorst, C.L., Kallen, V.L., & Blöte, A.W.
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(2011). Developmental changes in stress responsivity during the Leiden Public Speaking
Task: A two wave longitudinal study. Biennial Meeting of the Society for Research in
Child Development (SCRD): Philadelphia, US.
Sumter, S.R., Bokhorst, C.L., Miers, A.C. & Westenberg, P.M. (2010). Resistance to peer
influence trajectories. Biennial Meeting of the European Association of Research on
Adolescence (EARA), Vilnius, Lithuania
Sumter, S.R., Bokhorst, C.L., Miers, A.C., Blöte, A.W., Kallen, V.L., & Westenberg, P.M.
(2008). Social fears during adolescence: is there an increase in avoidance? Poster
presented at the 20th Biennial Meeting of the International Society for the Study of
Behavioural Development (ISSBD), Würzburg, Germany.
Miers, A.C., Blöte, A.W., Sumter, S.R., Bögels, S.M., & Westenberg, P.M. (2008, July).
Interpretation bias and social anxiety in adolescents. Poster presented at the 20th Biennial
Meeting of the International Society for the Study of Behavioural Development (ISSBD),
Würzburg, Germany.
Sumter, S.R., Bokhorst, C.L., Miers, A.C., Kallen, V.L., & Westenberg, P.M. (2008). Social
fears during adolescence: is it an increase in distress or avoidance? Poster presented at
12th Biennial Meeting of the Society for Research on Adolescence (SRA), Chicago, US.
Miers, A.C., Blöte, A.W., Sumter, S.R., Bögels, S.M. & Westenberg, P.M. (2008).
Interpretation bias and social anxiety in adolescents. Poster presented at 12th
Biennial Meeting of the Society for Research on Adolescence (SRA), Chicago, US.
Westenberg, P.M., Miers, A.C., Sumter, S.R., Kallen, V.L., Bokhorst, C.L. & Blöte, A.W.
(2008). Social-evaluation fear: does it increase during adolescence? Paper presented at
12th Biennial Meeting of the Society for Research on Adolescence (SRA), Chicago, US.
Sumter, S.R., Bokhorst, C.L., Miers, A.C., Blöte, A.W., Kallen, V.L., & Westenberg, P.M..
(2007). Development of perspective taking and social evaluation fear in adolescence.
Poster presented at the 37th Annual Meeting of the Jean Piaget Society (JPS),
Amsterdam, The Netherlands.
Sumter, S.R., Bokhorst, C.L., Miers, A.C., Blöte, A.W., Kallen, V.L., & Westenberg, P.M.
(2007). Can we discern a global developmental pathway for social evaluative anxiety?
Paper presented at expert meeting Risks and Opportunities in Adolescent Brain
Development, Leiden, The Netherlands.
14 | P a g eUpdated July 2021
Bokhorst, C.L., Blöte, A.W., Sumter, S.R., Miers, A.C., & Westenberg, P.M. (2008, March).
The development of public speaking anxiety and its relation with social anxiety. Poster
presented at the Biennial meeting of the Society for Research on Adolescence (SRA),
Chicago, US.
Sumter, S.R., Blöte, A.W., Bokhorst, C.L., & Westenberg, P.M. (2006). Negatively biased
perceptions and evaluation anxiety in late adolescence. Poster presented at the 11th
Biennial Meeting of the Society for Research on Adolescence (SRA), San Francisco, US.
Bokhorst, C.L., Sumter, S.R., & Westenberg, P.M. (2005). Temperament and (social) anxiety in
adolescents. Poster presented at the 13th meeting of the International Society for Research
on Emotions (ISRE), Bari, Italy.
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