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This double issue of IJDS comprises five regular manuscripts: Kissgen, Franke, Jorjadze, Roth, and Kribs (2021) report results from their study on infant–father attachment in infants born preterm in comparison to full-term infants using the Strange Situation Procedure. Surprisingly, the authors did not find significant differences between full-term and preterm infants regarding attachment security. These results have important implications e.g. with regard to including fathers in the care of preterm infants. Goagoses and Koglin (2021) investigate the association between parental attachment and externalizing behavior and whether this association is mediated by dysfunctional emotion regulation and callous-unemotional traits in adolescents using different questionnaires. Their study expands previous research by “simultaneously investigating familial and cognitive factors that foster externalizing behavior problems” (p. 9). Ioannidou and Zafiropoulou (2021) investigate negative parenting practices, victimization, negative affectivity, and internalizing symptoms in children, testing complex moderated-mediation models. “Moderated-mediation models highlighted that negative affectivity moderates the mediating effect of victimization on the relationship between parenting practices and internalizing symptoms” (p. 19). Rosenbach, Renneberg, and Scheithauer (2021) describe in their two-study paper the development of the German version of the English Children’s Rejection Sensitivity Questionnaire and prove the psychometric properties of the resulting Fragebogen zur Zurückweisungsempfindlichkeit für Kinder und Jugendliche. Finally, Longobardi, Fabris, Prino, and Settanni (2021) investigate the prevalence of online sexual victimization, including online grooming and sexting, and related risk factors in adolescents. Results obtained may inform the development of preventive interventions.

We very much hope that this issue reaches a wide readership. With this double issue, we also want to thank the expert reviewers for the issues of IJDS that have been published in 2020. Without their diligent efforts, we would not be able to implement a successful peer review process.

Herbert Scheithauer, Freie Universität Berlin




Goagoses, N. , & Koglin, U. (2021). Attachment and externalizing behavior: Mediation through dysfunctional emotion regulation and callous-unemotional traits. International Journal of Developmental Science, 15(1-2), 9–17.


Ioannidou, L , & Zafiropoulou, M. (2021). Parenting practices, victimization, and negative affectivity in child internalizing symptoms: Moderated-mediation models. International Journal of Developmental Science, 15(1-2), 19–28.


Kissgen, R. , Franke, S. , Jorjadze, N. , Roth, B. , & Kribs, A. (2021). Infant–father attachment in infants born preterm - A brief report. International Journal of Developmental Science, 15(1-2), 3–8.


Longobardi, C. , Fabris, M.A. , Prino, L.E. , & Settanni, M. (2021). Online sexual victimization among middle school students: Prevalence and association with online risk behaviors. International Journal of Developmental Science, 15(1-2), 39–46.


Rosenbach, C. , Renneberg, B. , & Scheithauer, H. (2021). Psychometric properties of the German version of the Children’s Rejection Sensitivity Questionnaire (CRSQ. International Journal of Developmental Science, 15(1-2), 29–37.

Bio Sketch

Herbert Scheithauer is Professor for Developmental and Clinical Psychology at Freie Universität Berlin, Berlin, Germany, and Head of the Unit “Developmental Science and Applied Developmental Psychology”. His research interests are on bullying, cyberbullying, and the development and evaluation of preventive interventions.