of PWB on job satisfaction as well as job performance. One study noted that because job satisfaction is specific to one's job, the research that examined job satisfaction had not taken into account aspects of one's life external to the job. Prior studies had focused only on the work environment as the main determinant of job satisfaction. Ultimately, to better understand job satisfaction (and its close relative, job performance), it is important to take into account an individual's PWB. Research published in 2000 showed a significant correlation between PWB and job satisfaction (r = .35, p < .01). A follow-up study by the same authors in 2007 revealed similar results (r = .30, p < .01). In addition, these studies show that PWB is a better predictor of job performance than job satisfaction alone. Job satisfaction more associate to mental health than physical health. Measuring The majority of job satisfaction measures are self-reports and based on multi-item scales. Several measures have been developed over the years, although they vary in terms of how carefully and distinctively they are conceptualized with respect to affective or cognitive job satisfaction. They also vary in terms of the extent and rigour of their psychometric validation. The Brief Index of Affective Job Satisfaction (BIAJS) is a four-item, overtly affective as opposed to cognitive, measure of overall affective job satisfaction. The BIAJS differs from other job satisfaction measures in being comprehensively validated not just for internal consistency reliability, temporal stability, convergent and criterion-related validities, but also for cross-population invariance by nationality, job level, and job type. Reported internal consistency reliabilities range between 0.81 and 0.87. The Job Descriptive Index (JDI) is a specifically cognitive job satisfaction measure. It measures one's satisfaction in five facets: pay, promotions and promotion opportunities, coworkers, supervision, and the work itself. The scale is simple, participants answer either yes, no, or can't decide (indicated by '?') in response to whether given statements accurately describe one's job. Other job satisfaction questionnaires include: the Minnesota Satisfaction Questionnaire (MSQ), the Job Satisfaction Survey (JSS), and the Faces Scale. The MSQ measures job satisfaction in 20 facets and has a long form with 100 questions (five items from each facet) and a short form with 20 questions (one item from each facet). The JSS is a 36 item questionnaire that measures nine facets of job satisfaction. Finally, the Faces Scale of job satisfaction, one of the