Dr T.J. (Tycho) Dekkers
Faculty of Social and Behavioural Sciences
Programme group Developmental Psychology
Visiting address
- Nieuwe Achtergracht 129
Postal address
- Postbus 15916
1001 NK Amsterdam
Contact details
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Profile
Tycho Dekkers works as assistant professor at the department of Developmental Psychology. His research interest is about the development of children and adolescents with externalizing problems, with a particular focus on psychosocial interventions for children with ADHD and behavioral problems. He obtained his PhD in January 2020 (cum laude) with a dissertation on risk-taking behavior in adolescents with ADHD. He is involved with the PAINT consortium (Psychosocial ADHD Interventions) and is a member of the Dutch Academic Workspace ADHD and the Dutch ADHD Netwerk. Furthermore, Tycho is a joint editor of the journal Child and Adolescent Mental Health.
Tycho also has an appointment as a senior researcher with Accare (Academic Child Psychiatry Groningen), and works in clinical practice as GZ-psychologist and expertise-coordinator ADHD at Levvel, academic center for child- and adolescent psychiatry and specialized youth care, in Amsterdam. His ultimate goal is to impove the link between science and clinical practice.
Video about effective elements of behavioral parent training for children with ADHD (Psych Congress).
PhD students:
- Eline Wagemaker (peer influence in adolescents with mild/borderline intellectual disability)
- Dominique Doffer (behavioral parent training for children with ADHD characteristics)
- Elisa Steenweg (behavioral teacher training for children with ADHD characteristics)
- Roos van Doornik (behavioral parent training for children with disruptive behavior)
- Yvonne Bors (MyLife therapy for adolescents with behavioral problems)
- Rianne van de Weitgraven (the link between playfulness and cognition in children)
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Publications
- refereed (25)
- academic (2)
- professional (13)
- recognitions (32)
- doctoral thesis (1)
- working papers / preprints (1)
- datasets (1)
2023
- Wesarg-Menzel, C., Ebbes, R., Hensums, M., Wagemaker, E., Zaharieva, M., Staaks, J. P. C., van den Akker, A. L., Visser, I., Hoeve, M., Brummelman, E., Dekkers, T. J., Schuitema, J. A., Larsen, H., Colonnesi, C., Jansen, B. R. J., Overbeek, G. J., Huizenga, H. M., & Wiers, R. W. H. J. (2023). Development and socialization of self-regulation from infancy to adolescence: A meta-review differentiating between self-regulatory abilities, goals, and motivation. Developmental Review, 69, [101090]. https://doi.org/10.1016/j.dr.2023.101090
2022
Dekkers, T. J., Groenman, A. P., Wessels, L., Kovshoff, H., Hoekstra, P. J., & van den Hoofdakker, B. J. (2022). Which factors determine clinicians’ policy and attitudes towards medication and parent training for children with Attention-Deficit/Hyperactivity Disorder? European Child & Adolescent Psychiatry, 31(3), 483-493. https://doi.org/10.1007/s00787-021-01735-4 [details]- Dekkers, T. J., Hornstra, R., van der Oord, S., Luman, M., Hoekstra, P. J., Groenman, A. P., & van den Hoofdakker, B. J. (2022). Meta-analysis: Which Components of Parent Training Work for Children With Attention-Deficit/Hyperactivity Disorder? Journal of the American Academy of Child and Adolescent Psychiatry, 61(4), 478-494. https://doi.org/10.1016/j.jaac.2021.06.015 [details]
- Dekkers, T. J., de Water, E., & Scheres, A. (2022). Impulsive and risky decision-making in adolescents with Attention-Deficit/Hyperactivity Disorder (ADHD): The need for a developmental perspective. Current Opinion in Psychology, 44, 330-336. https://doi.org/10.1016/j.copsyc.2021.11.002 [details]
- Hornstra, R., Dekkers, T. J., Bosmans, G., van den Hoofdakker, B., & van der Oord, S. (2022). Attachment Representation Moderates the Effectiveness of Behavioral Parent Training Techniques for Children with ADHD: Evidence from a Randomized Controlled Microtrial. Research on Child and Adolescent Psychopathology, 50(9), 1151-1164. https://doi.org/10.1007/s10802-022-00921-5 [details]
- Hornstra, R., Groenman, A. P., van der Oord, S., Luman, M., Dekkers, T. J., van der Veen-Mulders, L., Hoekstra, P., & van den Hoofdakker, B. (2022). Review: Which components of behavioral parent and teacher training work for children with ADHD? – a metaregression analysis on child behavioral outcomes. Child and Adolescent Mental Health. https://doi.org/10.1111/camh.12561
- Wagemaker, E., Dekkers, T. J., Bexkens, A., Salemink, E., Zadelaar, J. N., & Huizenga, H. M. (2022). Susceptibility to peer influence in adolescents with mild-to-borderline intellectual disability: Investigating links with inhibition, Theory of Mind and negative interpretation bias. Journal of Intellectual & Developmental Disability, 47(4), 376-390 . https://doi.org/10.3109/13668250.2022.2066511 [details]
- van Hoorn, J., de Water, E., Dekkers, T. J., Pollak, Y., Popma, A., Jansen, B. R. J., Huizenga, H. M., & van Duijvenvoorde, A. C. K. (2022). Peer feedback decreases impulsive choice in adolescents with and without attention‐deficit/hyperactivity disorder. JCPP Advances, 2(1), [e12065]. https://doi.org/10.1002/jcv2.12065 [details]
2021
- Dekkers, T. J., Agelink van Rentergem , J. A., Huizenga, H. M., Popma, A., Raber, H., Shoham, R., & Pollak, Y. (2021). Decision-Making Deficits in ADHD Are Not Related to Risk Seeking But to Suboptimal Decision-Making: Meta-Analytical and Novel Experimental Evidence. Journal of Attention Disorders, 25(4), 486-501. https://doi.org/10.1177/1087054718815572 [details]
- Dekkers, T. J., Hornstra, R., van den Hoofdakker, B. J., de Jong, S. R. C., Schaaf, J. V., Bosmans, G., & van der Oord, S. (2021). Attachment Representations in Children with and without Attention-Deficit/Hyperactivity Disorder (ADHD). Brain Sciences, 11, [1516]. https://doi.org/10.3390/brainsci11111516 [details]
- Dekkers, T. J., Huizenga, H. M., Bult, J., Popma, A., & Boyer, B. E. (2021). The importance of parental knowledge in the association between ADHD symptomatology and related domains of impairment. European Child & Adolescent Psychiatry, 30(4), 657-669. https://doi.org/10.1007/s00787-020-01579-4 [details]
- Dekkers, T. J., Rapport, M. D., Calub, C. A., Eckrich, S. J., & Irurita, C. (2021). ADHD and hyperactivity: The influence of cognitive processing demands on gross motor activity level in children. Child Neuropsychology, 27(1), 63-82. https://doi.org/10.1080/09297049.2020.1793924 [details]
- Zadelaar, J. N., Agelink van Rentergem, J. A., Schaaf, J. V., Dekkers, T. J., de Vent, N., Dekkers, L. M. S., Olthof, M. C., Jansen, B. R. J., & Huizenga, H. M. (2021). Development of decision making based on internal and external information: A hierarchical Bayesian approach. Judgment and Decision Making, 16(6), 1413-1438. http://journal.sjdm.org/21/210326/jdm210326.html [details]
2020
- Dekkers, T. J., Huizenga, H. M., Popma, A., Bexkens, A., Zadelaar, J. N., & Jansen, B. R. J. (2020). Decision-Making Deficits in Adolescent Boys with and without Attention-Deficit/Hyperactivity Disorder (ADHD): an Experimental Assessment of Associated Mechanisms. Journal of Abnormal Child Psychology, 48(4), 495-510. https://doi.org/10.1007/s10802-019-00613-7 [details]
- Dekkers, T. J., Popma, A., Sonuga-Barke, E. J. S., Oldenhof, H., Bexkens, A., Jansen, B. R. J., & Huizenga, H. M. (2020). Risk Taking by Adolescents with Attention-Deficit/Hyperactivity Disorder (ADHD): a Behavioral and Psychophysiological Investigation of Peer Influence. Journal of Abnormal Child Psychology, 48(9), 1129-1141. https://doi.org/10.1007/s10802-020-00666-z [details]
- Pollak, Y., Seri, O. G., & Dekkers, T. J. (2020). Attention-deficit/hyperactivity disorder (ADHD) and risk-taking behavior: The case of suboptimal decision making. Movement and Nutrition in Health and Disease, 4, 15-20. https://doi.org/10.5283/mnhd.23 [details]
- Wagemaker, E., Huizenga, H. M., Dekkers, T. J., Collot D'Escury-Koenigs, A. M. L., Salemink, E., & Bexkens, A. (2020). When Do those “Risk-Taking Adolescents” Take Risks? The Combined Effects of Risk Encouragement by Peers, Mild-to-Borderline Intellectual Disability and Sex. Journal of Abnormal Child Psychology, 48(4), 573-587. https://doi.org/10.1007/s10802-020-00617-8 [details]
- Zadelaar, J. N., Dekkers, T. J., & Huizenga, H. M. (2020). The association between risky decision making and attention‐deficit/hyperactivity disorder symptoms: A preregistered assessment of need for cognition as underlying mechanism. Journal of Behavioral Decision Making, 33(5), 579-592. https://doi.org/10.1002/bdm.2177 [details]
2019
- Dekkers, T. J., Agelink van Rentergem, J. A., Meijer, B., Popma, A., Wagemaker, E., & Huizenga, H. M. (2019). A meta-analytical evaluation of the dual-hormone hypothesis: Does cortisol moderate the relationship between testosterone and status, dominance, risk taking, aggression, and psychopathy? Neuroscience and Biobehavioral Reviews, 96, 250-271. https://doi.org/10.1016/j.neubiorev.2018.12.004 [details]
- Dekkers, T. J., van Bergen, N. R. J., & Jansen, B. R. J. (2019). An Assessment of the Psychometric Properties of the Brief Sensation Seeking Scale for Children. Journal of Personality Assessment, 101(4), 446-451. https://doi.org/10.1080/00223891.2018.1468336 [details]
- Pollak, Y., Dekkers, T. J., Shoham, R., & Huizenga, H. M. (2019). Risk-Taking Behavior in Attention Deficit/Hyperactivity Disorder (ADHD): a Review of Potential Underlying Mechanisms and of Interventions. Current psychiatry reports, 21(5), [33]. https://doi.org/10.1007/s11920-019-1019-y [details]
- Souverein, F., Dekkers, T., Bulanovaite, E., Doreleijers, T., Hales, H., Kaltiala-Heino, R., ... van der Pol, T. (2019). Overview of European forensic youth care: towards an integrative mission for prevention and intervention strategies for juvenile offenders. Child and Adolescent Psychiatry and Mental Health, 13, [6]. https://doi.org/10.1186/s13034-019-0265-4 [details]
2017
- Dekkers, T. J., Agelink van Rentergem, J. A., Koole, A., van den Wildenberg, W. P. M., Popma, A., Bexkens, A., Stoffelsen, R., Diekmann, A., & Huizenga, H. M. (2017). Time-on-task effects in children with and without ADHD: Depletion of executive resources or depletion of motivation? European Child & Adolescent Psychiatry, 26(12), 1471-1481. https://doi.org/10.1007/s00787-017-1006-y [details]
- Wagemaker, E., Dekkers, T. J., Agelink van Rentergem, J. A., Volkers, K. M., & Huizenga, H. M. (2017). Advances in Mental Health Care: Five N = 1 Studies on the Effects of the Robot Seal Paro in Adults With Severe Intellectual Disabilities. Journal of Mental Health Research in Intellectual Disabilities, 10(4), 309-320. https://doi.org/10.1080/19315864.2017.1320601 [details]
2016
- Dekkers, T. J., Popma, A., Agelink van Rentergem, J. A., Bexkens, A., & Huizenga, H. M. (2016). Risky decision making in Attention-Deficit/Hyperactivity Disorder: A meta-regression analysis. Clinical Psychology Review, 45, 1-16. https://doi.org/10.1016/j.cpr.2016.03.001 [details]
2023
- Dekkers, T. J., Groenman, A. P., Cuijpers, P., Hoekstra, P. J., Luman, M., Orobio de Castro, B., Overbeek, G., Popma, A., Rommelse, N., Salemink, E., Stikkelbroek, Y. A. J., van den Hoofdakker, B. J., van der Oord, S., & Leijten, P. (2023). Commentary: Why treatment is the best choice for childhood mental disorders – a commentary on Roest et al. (2022). Journal of Child Psychology and Psychiatry and Allied Disciplines, 470-473. https://doi.org/10.1111/jcpp.13715
- Hoekstra, P. J., van den Hoofdakker, B. J., Rosenau, P. T., Dietrich, A., Leijten, P., Groenman, A. P., & Dekkers, T. J. (2023). We need better long-term intervention programs in mental health care for children and young people with chronic vulnerabilities. European Child & Adolescent Psychiatry, 32(9), 1525-1527. https://doi.org/10.1007/s00787-023-02281-x
2021
- Dekkers, T. J. (2021). Sibling-interaction intervention for children with ADHD: A pilot study. In VGCT (Dutch Association for Cognitive and Behavioral Therapy) Conference
- Dekkers, T. J. (2021). Waarom adolescenten met ADHD risico’s nemen: biologische, cognitieve en sociale mechanismen. JGZ: tijdschrift voor jeugdgezondheidszorg, 53(1), 21-22. https://doi.org/10.1007/s12452-020-00232-5 [details]
- Dekkers, T., Popma, A., Jansen, B., & Huizenga, H. (2021). Risicogedrag bij jongeren met ADHD. Tijdschrift voor Orthopedagogiek, 60(2), 11-15. https://www.tijdschriftvoororthopedagogiek.nl/kennisbank/author/1978 [details]
- van den Boogaard, L., Popma, A., van der Hoeven, M., van den Boer, M., Bokhorst, P., Heerma, A., van der Meer, M., Steenmeijer, J., van der Stegen, B., & Dekkers, T. J. (2021). Intensive home treatment: indicatiecriteria bij kinderen en jongeren. Tijdschrift voor Psychiatrie, 63(3), 175-180. http://www.tijdschriftvoorpsychiatrie.nl/issues/562/articles/12482 [details]
2020
- Bors, Y., Popma, A., Willems, R., & Dekkers, T. J. (2020). Hoop, zelfwaardering en steun zoeken in de behandeling van adolescenten, kan JIJ het meten? Psychometrische eigenschappen van de JIJ-vragenlijst. Kinder- & Jeugdpsychotherapie, 47(3), 173-191. [details]
- Dekkers, T. (2020). ADHD en risicogedrag bij jongeren. Kind en Adolescent Praktijk, 19(3), 29. https://doi.org/10.1007/s12454-020-0612-x [details]
- Dekkers, T., Popma, A., Jansen, B., & Huizenga, H. (2020). Risicogedrag bij jongeren met ADHD: wat kan je ermee in het onderwijs? Remediaal, 5(6), 57-59. [details]
- Wagemaker, E., Huizenga, H. M., Dekkers, T. J., Collot d'Escury-Koenigs, A., Salemink, E., & Bexkens, A. (2020). “Je bent een loser als je stopt”: De rol van groepsdruk bij risicogedrag van jongeren met een licht verstandelijke beperking. Kinder- & Jeugdpsychotherapie, 47(3), 41-55. [details]
2019
- Heegstra, F., Dekkers, T., & Popma, A. (2019). Dialectische gedragstherapie op een forensische polikliniek: Aandacht voor depressie, angst en trauma bij criminele jongeren. Kind en Adolescent Praktijk, 18(3), 6-13. https://doi.org/10.1007/s12454-019-0027-8 [details]
- Wagemaker, E., Bexkens, A., Dekkers, T. J., Salemink, E., & Huizenga, H. M. (2019). LVB-jongeren en groepsdruk: werk in uitvoering. Kind en Adolescent Praktijk, 18(1), 33-35. https://doi.org/10.1007/s12454-019-0008-y [details]
2018
- Dekkers, T. J., Agelink van Rentergem, J., Koole, A., van den Wildenberg, W. P. M., Popma, A., Bexkens, A., Stoffelsen, R., Diekmann, A., & Huizenga, H. M. (2018). Time-on-task-effecten bij kinderen met en zonder ADHD: Uitputting van executieve functies of uitputting van motivatie? Tijdschrift voor Neuropsychologie, 13(3), 179-191. https://www.tvnp.nl/inhoud/tijdschrift_artikel/NP-13-3-3/Time-on-task-effecten-bij-kinderen-met-en-zonder-ADHD-Uitputting-van-executieve-functies-of-uitputting-van-motivatie [details]
2016
- Dekkers, T. J., Agelink van Rentergem, J. A., Popma, A., Bexkens, A., & Huizenga, H. M. (2016). Risicovol beslisgedrag bij ADHD: Een metaregressieanalyse. Neuropraxis, 20(6), 170-176. https://doi.org/10.1007/s12474-016-0141-4 [details]
- Dekkers, T., Popma, A., Jansen, B., Bexkens, A., & Huizenga, H. (2016). Risicogedrag bij adolescenten met ADHD. Kind en Adolescent Praktijk, 15(4), 38-41. https://mijn.bsl.nl/risicogedrag-bij-adolescenten-met-adhd/11954182 [details]
Prize / grant
- Dekkers, T. (2021). Eunethydis Kramer-Pollnow Prize - shortlisted.
- Dekkers, T. (2020). Frank J. Verhulst award - 2nd place.
- Dekkers, T. (2016). Most talented young researcher, EFCAP (European Association for Forensic Child and Adolescent Psychiatry, Psychology) Conference 2016, Porto, Portugal.
Membership / relevant position
- Dekkers, T. (2018-2021). Academische Werkplaats ADHD & Druk Gedrag.
- Dekkers, T. (2018-2021). ADHD Netwerk.
Media appearance
- Dekkers, T. & Staff, A. (17-12-2021). Opinie: ‘Schoolsluiting raakt kwetsbaarste kinderen het hardst’ [Print] Het Parool. Opinie: ‘Schoolsluiting raakt kwetsbaarste kinderen het hardst’. https://www.parool.nl/cs-bb78cd87
- Dekkers, T. (19-01-2021). Effective elements of parent training for ADHD. Effective elements of parent training for children with ADHD. https://www.psychcongress.com/multimedia/examining-behavioral-parent-training-intervention-children-adhd
Journal editor
- Dekkers, T. (editor) (2021-2023). Child and Adolescent Mental Health (Journal).
Talk / presentation
- Dekkers, T. (speaker) (15-1-2021). Effective elements of parent training for ADHD: A meta-regression analysis on parenting outcomes, APSARD (American Professional Society of ADHD and Related Disorders) Conference .
- Dekkers, T. (speaker) (10-8-2020). Effective elements of parent training for ADHD: A meta-regression analysis on parenting outcomes, Eunethydis (European Network of Hyperkinetic Disorders) digital conference.
- Dekkers, T. (speaker) (11-5-2020). Hoe evidence-based is de niet-medicamenteuze zorg voor kinderen met ADHD en welke factoren bepalen het beleid van behandelaren?, VGCT (Dutch Association for Cognitive and Behavioral Therapy) Conference.
- Dekkers, T. (speaker) (29-11-2019). Susceptibility to peer influence in adolescents with ADHD, VGCT (Dutch Association for Cognitive and Behavioral Therapy) Conference, Veldhoven.
- Dekkers, T. (speaker) (23-10-2019). Risk-taking behavior in adolescents with ADHD: elucidating underlying mechanisms, Mini conference on ADHD and decision making, Hebrew University of Jerusalem, Israel.
- Dekkers, T. (speaker) (19-9-2019). ADHD and hyperactivity: The influence of cognitive processing demands on gross motor activity level in children, Eunethydis (European Network of Hyperkinetic Disorders) Conference, Nijmegen.
- Dekkers, T. (speaker) (15-2-2019). Risky decision making in adolescents with ADHD, Current Perspectives on Adolescent Risk Taking symposium, Leiden.
- Dekkers, T. (speaker) (11-10-2018). Sexual risk-taking behavior: from science to practice, Bascule/Spirit.
- Dekkers, T. (speaker) (24-9-2018). Risk taking in adolescents with ADHD, Eunethydis International Conference, Edinburgh, United Kingdom.
- Dekkers, T. (speaker) (21-6-2018). Testosterone by cortisol interactions on status-relevant behavior: a meta-analysis, EFCAP (European Association for Forensic Child and Adolescent Psychiatry, Psychology) Conference 2018, Venice, Italy.
- Dekkers, T. (speaker) (16-5-2018). Social influences on risky decision-making in adolescents with ADHD: the impact of peer pressure and parental monitoring, VNOP (Dutch association for Developmental Psychology) conference, Wageningen.
- Dekkers, T. (speaker) (11-4-2018). The influence of peer pressure on risky decision making in adolescents with and without ADHD, NVVP (Dutch association for psychiatry) Conference, Maastricht.
- Dekkers, T. (speaker) (20-3-2018). Decision making strategies in adolescents with ADHD, International ADHD Congress, Tel Aviv, Israel.
- Dekkers, T. (speaker) (14-7-2017). A biopsychosocial perspective on risk taking, Free University Symposium, Amsterdam.
- Dekkers, T. (speaker) (21-4-2017). Time-on-task effects in children with and without ADHD: Depletion of executive resources or depletion of motivation?, World Congress on ADHD, Vancouver, Canada.
- Dekkers, T. (speaker) (21-4-2017). Disentangling risky and suboptimal decision making in ADHD, World Congress on ADHD, Vancouver, Canada.
- Dekkers, T. (speaker) (17-5-2016). The interplay between peer pressure and hormones affecting risky decision making in adolescents with ADHD: A research agenda, VNOP (Dutch association for Developmental Psychology) conference 2016, Wageningen.
- Dekkers, T. (speaker) (13-5-2016). Risky decision making in ADHD, EFCAP (European Association for Forensic Child and Adolescent Psychiatry, Psychology) Conference 2016, Porto, Portugal.
- Dekkers, T. (speaker) (22-9-2015). Science and clinical practice, a great combination, GGZ Kennisdag 2015, Amersfoort.
- Dekkers, T. (speaker) (21-6-2015). Risky decision making in ADHD, ESCAP (European Society for Child and Adolescent Psychiatry) conference 2015, Madrid, Spain.
- Dekkers, T. (speaker) (25-11-2014). Cross-pollination between science and clinical practice, VNOP PhD Day 2014, Utrecht.
- Dekkers, T. (speaker) (12-9-2014). The effects of resource depletion and motivation on executive functioning in children with and without ADHD, EABCT (European Association of Behavioral and Cognitive Therapy) conference 2014, The Hague, the Netherlands.
- Dekkers, T. (speaker) (20-5-2014). Bridging the gap: Risky decision making in ADHD – a scientist practitioner project, VNOP Conference 2014, Wageningen.
Others
- Jansen, B. (participant) & Dekkers, T. (participant) (24-10-2019). ADHD and risk-taking behaviour, Tel Aviv. Discussant at round table: "Cognitive mechanisms of risk-taking behavior in ADHD" (participating in a conference, workshop, ...).
2021
- Blankenstein, N., van Hoorn, J., Dekkers, T. J., Popma, A., Jansen, B. R. J., Weber, E., Pollak, Y., Figner, B., Crone, E., Huizenga, H. M., & van Duijvenvoorde, A. (2021). Risk taking, perceived risks, and perceived benefits across adolescence: A domain-specific risk-return approach. https://psyarxiv.com/wv26z/
2020
- Zadelaar, J., Agelink van Rentergem Zandvliet, J., Schaaf, J., Dekkers, T., de Vent, N., Dekkers, L., Jansen, B. & Huizenga, H. (2020). Decision Making Based On Internal And External Information (Codes and Supplementary Materials). Mendeley Data. https://doi.org/10.17632/27fhx4f2k3.1
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Ancillary activities
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de Bascule
GZ-Psycholoog, Expertisecoördinator ADHD -
Accare
wetenschappelijk onderzoek
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de Bascule
Dekkers, T. J., Groenman, A. P., Wessels, L., Kovshoff, H., Hoekstra, P. J., & van den Hoofdakker, B. J. (2022). Which factors determine clinicians’ policy and attitudes towards medication and parent training for children with Attention-Deficit/Hyperactivity Disorder? European Child & Adolescent Psychiatry, 31(3), 483-493.