113 Creating A Creative State of Mind mindfulness and creativity, which were often cross-sectional in nature and/or employed student samples (for a meta-analysis, see Lebuda et al., 2016). Moreover, we use a general measure of daily creativity (i.e., a brainstorming task) that has often been used in previous studies to enable comparisons between our results and earlier findings. Finally, we extend previous research by focusing on an additional explanatory mechanism between proactive behaviors, such as proactive vitality management, and creative performance. Whereas Bakker et al. (2020) addressed the affective side of the process by advancing work engagement as a mediating mechanism, we aim to broaden our understanding of the proactive vitality management-creativity link by focusing on the cognitive aspect of the process. To support our investigation and the added value of the proposed cognitive mechanism, we includedwork engagement as a control variable in our analyses in Study 1. METHOD Procedure and Participants Participants were recruited via AmazonMechanical Turk (MTurk), andwere paid for their participation through this platform. To ensure high-quality data, one criterion was that participants had to have a good ‘reputation’ on MTurk (i.e., above 95% approval ratings), which represents the quality of past responses and data entries in the system (cf. Peer et al., 2014). Several studies have shown that data collected through the MTurk platform are reliable and valid (e.g., Buhrmester et al., 2011; Peer et al., 2014). In the introductory message, participants were explained that the study aimed to gain insights on their daily work experiences andwell-being throughfive daily surveys. Participantswere instructed to fill out eachquestionnaire at the end of eachworking day, over the course of five consecutive workdays, requiring full-time work for participation. We asked participants to fill in their MTurk ID at the beginning of each daily survey to be able to match their responses across the five days. In total, 133 participants signed in to participate in our study, who eventually filled out 521 daily questionnaires in total (3.92, on average). Participants’ mean age was 36.26 (SD = 10.57), and 52%of the samplewasmale. Of all participants, 65%held a college or university degree. Participantsworked on average 41.64 hours per week (SD = 6.82) in awide range of professions and sectors, including computer and electronics (18.6%), retail (14.7%), finance and insurance (10.9%), education (6.2%), entertainment and recreation (6.2%), healthcare (5.0%), government and public administration (4.7%), hotel and food services 5
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