Discussion
The design of this study was based on theoretical assumptions from the JD-R theory (Bakker & Demerouti, 2014), which state that optimizing job demands and resources may contribute to employee engagement. To our knowledge, this is the first study showing employees’ work engagement indeed can be fostered by a job crafting intervention. Earlier intervention studies aimed at enhancing employee work engagement showed that positive outcomes are not self-evident. A meta-analysis of 15 positive psychology interventions in organizations by Meyers, Van Woerkom & Bakker (2013) revealed that only one of them (a 7- week resilience building program) successfully enhanced participants work engagement. In addition, a study by Ouweneel, Le Blanc & Schaufeli (2013) among employees of different organizations revealed that an online intervention (containing goal setting assignments) was successful in enhancing positive emotions and self-efficacy but failed to show enhanced levels of work engagement. In contrast to intervention studies that have an individual focus and that take place in a classroom or online behind a computer, the current job crafting intervention took place in the employees’ own work context, which facilitates transfer. Earlier research already revealed that learning at work is more effective than learning at an external location because direct links to the working situation can be made (Kessels, 1993), which amplifies the transfer (the actual application after the training of things learned) (Kessels, 2001).