## 4 Discussion
### CCT and Well-Being  
An unexpected pattern was observed between the association of self-reported changes in cognitive performance during the three month period of the administration of CCT and self-evaluated health status and well-being. Participants from the control group who reported a worsening of their cognitive functioning showed a lower self-evaluated health status (Figure 5), while participants from the intervention group did not report any decline in their health-status and well-being. These findings may suggest that the CCT's effects are not only the improvement of cognitive performance but also the preservation and maintenance of health and well-being while maintaining productivity at the same level. To the best of our efforts, we could not find publications in this regard.  
None of the studies on the effectiveness of CCT for employees have investigated the effects of CCT on participants' well-being, life satisfaction, or health status. According to [PERSON] et al. [75], digital technologies have the potential to improve the quality of working life for older workers [75]. Thus, our study is the first to report the effects of CCT on older employees' well-being. Employees in the intervention group reported their health status and well-being as unchanged after CCT, while participants in the control group expressed a significant decline. The closest comparisons regarding the effectiveness of CCT on self-evaluated life satisfaction can be found in reports on the effectiveness of CCT with older adults. A few studies have reported improved self-evaluated well-being after CCT [76]. Similarly, [PERSON] et al. [77] reported that an online brain training program, MyBrainSolutions, positively affected well-being. The maintenance of well-being after CCT is consistent with findings reported in a review article by [PERSON] et al. [78], who noted significant improvements in well-being in older adults with subjective memory complaints. However, there are a few other meta-analyses investigating the effects of commercial video and action video games as tools for enhancing individuals' well-being, particularly in terms of cognitive and emotional enhancement [79; 80; 81].  
Our findings are also in line with conclusions from a meta-analysis that reviewed publications related to the effectiveness of interventions for improving subjective well-being among workers [82]. They reported that mindfulness and cognitive-behavioral approaches may be useful for improving employees' well-being. We can now add that CCT can also help maintain older workers' well-being. Furthermore, a systematic literature review of cognitive intervention studies among individuals with mild cognitive impairment [83] suggested that some interventions were equally or more effective on subjective measures of mood and quality of life than on objective measures of cognitive domains. Therefore, an improvement or even no change in well-being and life satisfaction scales at the end of the CCT might be considered a desirable treatment outcome. In other words, the benefits of CCT may translate into the daily functioning and mood of the participants, which should be the ultimate goal of any cognitive program or intervention. This also supports the argument that CCT in the workplace may have more distal/far-transfer effects on workers and their life's well-being.