Normatywne i nienormatywne trudne zachowania dzieci w wieku poniemowlęcym w sytuacji wejścia w rolę starszego rodzeństwa
Normative and Non-Normative Difficult Behaviors of Toddlers in the Situation of Entering the Role of Older Sibling

Summary/Abstract: The purpose of the study was to verify whether the birth of younger siblings is associated with an increase in the number of difficult normative and non-normative behaviors in children at the toddler’s age. The study involved 68 pairs of parents with children aged 24 to 36 months. There were two groups of respondents: 1. parents of only children (N = 36 pairs), and 2. parents with two children (N = 32 pairs). Individual variables concerning children were analyzed: the intensity of adverse behaviors and the intensity of rebellious behaviors related to the crisis of the second and third year of life. These variables were measured with the Questionnaire for Child Behavior in the Age of 1.5–5 years (CBCL) and the Behavior Scale of 2–3 years. The analysis of the obtained data has shown that the only children manifest more non-normative behaviors than their peers who have a younger sibling. Girls who played the role of an older sister showed slightly more undesirable behaviors than their peers. The results of the above studies allowed to determine that the birth of younger siblings is associated with the occurrence of more non-normative behaviors differently for girls and boys.

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