Work-related mental fatigue

Work-related mental fatigue is measured based on the following statements:
— I feel emotionally exhausted by my work.
— At the end of a working day, I feel empty.
— I feel tired when I get up in the morning at the thought of starting work.
— It takes a lot out of me to work with people all day long.
— I feel completely exhausted by my work.
The possible responses are: never, several times a year, monthly, several times a month, weekly, several times a week, or every day. If someone’s average response to these statements is several times a month or more frequently, this person’s contribution is viewed as representing mental fatigue caused by work.