Some work in press for 2021:

Min, J.L. et al. (2021; in press). Genomic and phenomic insights from an atlas of genetic effects on DNA methylation. Nature Genetics.

Van IJzendoorn, M.H. & Bakermans-Kranenburg, M.J. (2021, in press). Replication crisis lost in translation? On translational caution and premature applications of attachment theory. Attachment & Human Development.

Papers published online:

On March 17 The Lancet Psychiatry published online the paper on causal effects of child maltreatment on later poorer mental health. The Conversation published a summary of the main points for a wider readership.

On June 24, 2020 The Lancet Psychiatry and The Lancet Child and Adolescent Health published our papers on institutionalisation and de-institutionalisation, with some commentaries; the papers are open access:

A webinar presentation about institutional child rearing was uploaded on youtube video:

On April 21  The Lancet Child & Adolescent Health published our letter on The implications of COVID-19 for the care of children living in residential institutions.

On March 15, 2021 JAMA Pediatrics published online our successful VIPP-SD RCT with O’Farrelly , Ramchandani et al.: A Brief Home-Based Parenting Intervention to Reduce Behavior Problems in Young ChildrenA Pragmatic Randomized Clinical TrialJAMA Pediatr. Published online March 15, 2021. doi:10.1001/jamapediatrics.2020.6834


Some recently published work:

Hamaker, E.L.,  Mulder, J.D., &  van IJzendoorn, M.H. (2020). Description, prediction and causation: Methodological challenges of studying child and adolescent developmentDevelopmental Cognitive Neuroscience, 46, 100867, ISSN 1878-9293,

article link:

In The Lancet Psychiatry a letter on the use of attachment theory in perinatal, infant and child psychiatry: From attachment to mental health and back

galbally et al. 2020 From attachment to mental health and back. The Lancet Psychiatr

Problematic cost-utility analysis of interventions for behavior problems in children and adolescents

New Directions in Child and Adolescent Development

van IJzendoorn & Bakermans-Kranenburg 2020 NDCAD Problematic cost–utility analysis ofinterventions for behavior problems in children and adolescents

The Conversation published March 31, 2020 our brief piece for young parents on bonding (or the absence thereof) with their newborn


Published in 2020

Oxford Handbook of Children and the Law (Editor: Jim Dwyer)

with our chapter on ‘Legislation in Search of “Good-Enough” Care Arrangements for the Child: A Quest for Continuity of Care’ (Marinus H. van IJzendoorn, Marian J. Bakermans-Kranenburg, Robbie Duschinsky, and Guy C. M. Skinner)

Two papers in press on child maltreatment

Van IJzendoorn, M.H., Bakermans-Kranenburg, M.J., Duschinsky, R., Goldman, P.S., Fox, N.A., Gunnar, M.R., Johnson, D.E., Nelson, C.A., Reijman, S., Skinner, G.C.M., Zeanah, C.H., & Sonuga-Barke, E.J.S. (2020, in press). The impact of institutionalisation and deinstitutionalisation on children’s development -A systematic and integrative review of evidence from across the globe. Lancet Psychiatry, in press.

Van IJzendoorn, M. H., Bakermans‐Kranenburg, M. J., Coughlan, B., & Reijman, S. (2020, in press). Umbrella synthesis of meta‐analyses on child maltreatment antecedents and interventions: differential susceptibility perspective on risk and resilience. Journal of Child Psychology and Psychiatry.

PhD dissertation of David van IJzendoorn defended on January 16, 2020, at Leiden University Medical Center

At three different universities three wonderful PhD students successfully defended their PhD theses in 2019

van Hoof, Marie-Jose (November 21, 2019). Unresolved-Disorganized Attachment, Psychopathology, and the Adolescent Brain. Leiden University (Advisors: prof.dr. M.H. van IJzendoorn, prof. dr. R.R.J.M. Vermeiren & dr. M.M.E. Hendricx-Riem)
Neumann, Alexander (June 21, 2019). General Psychopathology in Children. Epidemiological studies of Biological Mechanisms. Erasmus Universiteit Rotterdam (Advisors: prof.dr. M.H. van IJzendoorn, prof. dr. M.J. Bakermans-Kranenburg & prof. dr. H. Tiemeier)
Verhees, Martine (September 4, 2019). Exploring dynamics and mechanisms of attachment variability in middle childhood. KU Leuven. (Advisors: prof dr Guy Bosmans, prof.dr. M.H. van IJzendoorn & prof. dr. Eva Ceulemans).

Lifetime Achievement Award 2019
The Society for Emotion and Attachment Studies (SEAS) awarded Marinus van IJzendoorn the Lifetime Achievement Award 2019 at the International Attachment Conference (IAC) in Vancouver, Canada, July 18-20, 2019.

Remarkable email from John Ioannidis on the new impact ranking

(August 20, 2019) 

Warm congratulations by Ioannidis in an email

Dear friends and colleagues

We have just published in PLoS Biology a paper that presents detailed, standardized citation data annotated for scientific field for multiple impact indicators and their composite across science

I want to congratulate you for being in the top 0.01% of scientists based on your impact.

The presented metrics capture not only total citations and h-index, but also co-authorship adjusted impact, and information on impact in papers according to different author positions (single, first, last author). As you know, citation metrics are widely used and misused, and we hope that this effort will allow for a more transparent, more comparable, and less error-prone approach to these metrics. We present very detailed data on all the top-100,000 scientists across science and additional field-adjusted information that can be used to map all 7 million scientists who have published at least 5 papers in their career. across all 22 major fields and all 176 sub-fields. Extensive information is also provided on self-citations and metrics are estimated both with and without self-citations.

The raw data are available for download and unrestricted use at Mendeley Data. I hope you enjoy these databases!

With best wishes for continued success,


John P.A. Ioannidis, MD, DSc
C.F. Rehnborg Professor in Disease Prevention
Professor of Medicine, of Health Research and Policy, and (by courtesy) of Biomedical Data Science, and of Statistics
Co-Director, Meta-Research Innovation Center at Stanford (METRICS)
Director, PhD Program in Epidemiology and Clinical Research
Stanford University

Conflict of Interest Disclosure Form should not include questions about personal beliefs, activities or life-style

As one of the Associate Editors of Child Development Marinus wrote a letter to the Publication Committee of the SRCD to point out that the non-financial conflict of interests disclosure is an encroachment of some fundamental human rights including freedom of speech.

See the statement here:

Argument against scientific journals’ Non-financial Conflict of Interest

A paragraph from the statement:

Newton believed in astrology, Einstein was a pacifist during war-time, Heidegger was a Nazi, Sartre a Maoist, Darwin has been accused of being an atheist and an anti-feminist, Watson (discoverer of the double helix) a sexist like Trivers, and many other scientists who did great work: whatever we feel about such beliefs, as scientists (authors, reviewers, editors) we should try to evaluate their work as part of World 3 in the sense of Karl Popper, without ties to the person who conducted a study and wrote a paper: not the author but the text and the data reported in the text are the only important object of scrutiny. Otherwise there is a risk of a new kind of McCarthyism of which Linus Pauling like many other scientists did suffer in the fifties, or closer to modern times: a risk of Erdogan-type of persecution experienced by our scientific colleagues in Turkey, dismissed without due process from their tenured positions because of their political ideas.

The good news is that the Publication Committee of the SRCD decided last month to delete this part of the Conflict of Interest Form! The Committee members are gratefully acknowledged for discussing these issues seriously and to decide accordingly.

Bad news about migrant children at the USA-Mexican border

A Troubling Prognosis for Migrant Children in Detention_ – The New York Times June 18 2018

The long-lasting health effects of separating children from their parents at the U.S. border Los Angeles Times June 20, 2018

    • •Van IJzendoorn, M.H. & Bakermans-Kranenburg, M.J. (2014, May 21). ‘Tackling child behaviour problems effectively requires better understanding of differences between an ‘orchid’ child and a ‘dandelion’ child’. Retrieved from

Child and Family Blog

    • • Securely attached to science. Psychologist, (2013), 26(9), 639.


    • • Wall Street Journal, interview with Jonathan Rockoff on differential susceptibility, September 17, 2013, on page D2 in the U.S. edition


    • • Neue Zuercher Zeitung, December 23, 2010, on differential susceptibility


    • • Frankfurter Allgemeine Zeitung, January 24 2010, on adoption from Haiti


    • • The Atlantic Monthly, December issue 2009, pp 60-68, interview with David Dobbs on Orchid Children


    • • Mare, Leiden University Weekly, December 13, 2007, listed with 3 papers in the ranking of the 10 most frequently cited Leiden University papers since


    • 1981 in the social and behavioral sciences (ranks 1, 2, and 9).


    • • HP/De Tijd November 30, 2007, listed as one of the 20 most influential scientists/ thinkers in the Netherlands


    • • Minneapolis Star Tribune (May 24, 2005) interview with L. Tanner + J. Hopfensperger: Foreign adoptees adjust well in new homelands


    • • Miami Herald (May 25, 2005) interview with L. Tanner: Study: Kids adopted from abroad adapt well (also in: Chicago Tribune, Boston Globe, and Los


    • Angeles Times (May 24, 2005)


    • • The New York Times, The New York Post, USA Today and The Washington Post (May 25, 2005)


    • • Forbes (May 25, 2005) interview with R. Preidt: International Adoptees At Lower Risk of Behavior Problems


    • • BBC World Radio interview May 25, 2005, on International vs national adoptions


    • Wall Street Journal, April 12 2005, interview with Sue Shellenbarger: Child care boost academics, hurt behavior.