"This article combines insights from the union revitalization literature focusing on young people and the burgeoning work advocating a crossfertilization between the research on organizing unionism and the union commitment studies rooted in organizational psychology. Based on the findings of an e-survey conducted in a Belgian union, the argument is developed that there is an unmet demand by relative new union members to be more involved in union work via ‘small' tasks inspired by organizing unionism. Also, while some of the tasks require segmented union policies, older new members should not a priori be excluded from revitalizing unions. Among other antecedents, two variables derived from the theory of planned behaviour are important predictors for such a type of union activism: the pro-union context and behavioural self-control. "

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