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Children's moral self-concept (MSC) has been proposed to relate to prosocial behaviour. However, systematic assessments of their inter-relations are scarce. Therefore, this longitudinal study investigated the development, structure and inter-relation of prosocial behaviours and the MSC in childhood, using three measurement points at ages 4, 5 and 6 years. We assessed children's MSC and helping, sharing and comforting behaviours in a laboratory setting. Confirmatory factor analyses revealed a three-dimensional MSC structure at 5 and 6 years, but not at 4 years. There was inconsistent stability across time points regarding prosocial behaviour and MSC. For the comforting domain, but not the other domains, cross-lagged relations between self-concept and behaviour were present. Moreover, helping behaviour and self-concept were inter-related at 6 years. Results provide support for reciprocal associations between MSC and prosocial behaviour, albeit only in the comforting domain. They highlight the importance of distinguishing between types of prosocial behaviour and corresponding dimensions of the self-concept, as different developmental trajectories and associations emerge.
Söldner et al. (Thu,) studied this question.