Studies indicate that those with a positive mental attitude or PMA as it's often referred to, has a well, positive impact on people’s lives in general. According to an article in the Chicago Tribune

‘Thousands of articles in virtually all popular, medical, health and news journals
tout the benefits of PMA on longevity and many other positive aspects of aging,’
says Dr. Peter Norvid, a geriatric specialist treating patients at Adventist Hinsdale
and La Grange Memorial hospitals and medical director for Heartland Hospice.
‘Optimistic people live longer, have closer personal relationships and are able
to deal with the negative things that happen to them in a way that allows them
                                         to continue to be able to be there for others so that others can help them.’

But can this same PMA have a positive effect in the workplace?

According to an article in HR Magazine by Aileen Wilkins, that would be affirmative – to a point. In other words, while a toxic culture breeds “unhealthy internal politics and dysfunction”, a more positive culture can lead the way for people to “focus on growth, minimize internal politics, and constructively support and challenge each to do better.” Further, employees are more engaged. Ms. Wilkins is not claiming that people will go around singing “The Happy Song” or even be joyous, but simply that people will work together better and be more productive.