Longitudinal study shows prosocial behaviour promotes happiness in preschool children, indicating emotional growth.
A growing number of studies suggest that prosocial acts elicit positive emotions in young children (Aknin et al. 2012 PLoS One, 7, e39211 (doi:10.1371/journal.pone.0039211); Hepach et al. 2017 Dev. Psychol. 53, 100–113 (doi:10.1037/dev0000173); Song et al. 2020 Front. Psychol. 11, 1398 (doi:10.3389/fpsyg.2020.01398)). However, prior work has only been cross-sectional and focused on one type of prosocial behaviour. Recognizing that prosocial behaviour is diverse and develops rapidly throughout the preschool years, the current longitudinal study examined happiness after instrumental helping, comforting and sharing in children when they were 2 (n = 200), 3 (n = 161) and 4 (n = 135) years old. Results revealed that children who engaged in prosocial action without being prompted to do so showed the highest happiness, with happiness being specific to time point and type of prosocial task. To our knowledge, this is the first longitudinal study investigating positive emotions as a mechanism underlying prosocial development.
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Gibhardt et al. (2025) studied this question.
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