Variables | Scale | Cronbach’s alpha coefficient |
Job autonomy | Frese, Kring, Soose, and Zempel’s (1996) | 0.87 |
Personal initiative | Frese, Fay, Leng, Hilburger, and Tag’s (1997) | 0.91 |
Psychological well-being | Brunetto and colleagues’ (2011) | 0.88 |