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These days, people who wouldn鈥檛 dream of making racial and ethnic slurs can be heard agreeing with ageist comments and laughing at jokes about older people.

The workplace is not free of these attitudes. According to a听听of workers and job seekers between the ages of 55 and 70, 43 percent of those who were currently seeking work or who had retired because they could not find work said the main problem was 鈥渢hey could not find an employer who would hire someone their age.鈥� Nearly a quarter of all charges brought to the United States Equal Employment Opportunity Commission last year claimed discrimination on the basis of age. Nevertheless, ageism鈥攄iscrimination on the basis of age鈥攊s a diversity issue that employers in the United States are only beginning to understand.

Certainly employers worry about avoiding legal action by older workers whom they lay off or pass up for promotion. But are they thinking deeply about the impact that the perception of bias might have on their employees generally鈥攅ven those who don鈥檛 sue? A recent study that we conducted at Boston College鈥檚 Sloan Center on Aging & Work suggests they should. (The results will be published in the June 2012 issue of the听Journal of Managerial Psychology.)

We wondered, does the perception of age bias in the workplace have an impact on employees鈥� motivation or sense of engagement in their jobs? To answer this question, we surveyed more than 4,000 retail workers (ranging in age from 18 to 94) in three regions of the United States.

Studying perceptions of age bias in the workplace is quite a challenge; employers are understandably reluctant to allow researchers to ask direct questions about actual experiences of age bias. Instead we asked respondents the extent to which they agreed with the statement, 鈥淲orkers age 55 and older are just as likely to be promoted as younger workers.鈥� We interpreted disagreement with that statement as indirect evidence of perceived age bias. We also probed perceptions of older workers鈥� capabilities for promotion, by asking the extent to which employees agreed with statements about older workers鈥� flexibility, ability to adapt to new technology, interest in training, and eagerness for promotion鈥攖raits deemed to be important for productive work.

Age bias can be intentional or unintentional. Our study tested the hypothesis that the difference between the two matters in terms of the extent to which bias is seen as fair or unfair, and thus the extent to which the perception of bias might affect work motivation.

For example, if employees believe that older workers should step aside and allow younger employees to move up, seeing older workers passed over for promotions should strike them as fair, and their sense of engagement and motivation at work should not diminish. Since all age bias is discriminatory, we refer to this phenomenon as听perceived unintentional discrimination.

Similarly, employees who believe that older workers generally are not worthy of promotions because they lack flexibility, the capacity to adapt to new technology, interest in training, and eagerness for promotions should consider it fair for older workers as a group to be passed over for promotions. This, too, we reasoned, is a perception of unintentional bias that would not be likely to depress work engagement.

In contrast, if employees view older workers as a group as both capable and eager for promotions that are denied, the bias these employees observe would be听perceived intentional discrimination, and its effect should be to decrease work engagement.

One result of our study surprised us. As we expected, the survey responses of employees of all ages who perceived that workers age 55 and older were less likely to be promoted than younger workers showed these employees to be less engaged in their work than those who did not perceive such discrimination. Also as expected, the perception of unintentional discrimination was more strongly related to lower employee engagement among older workers than younger workers. Our hypothesis did not prepare us for the finding that the perception of intentional discrimination was actually more strongly related to lower employee engagement among younger workers than older workers.

In practical terms, the perception of discrimination, whether intentional or unintentional, against older workers across age groups creates a difficult environment for managers. Perceptions of age bias in promotion decisions seem to make employees less likely to go that extra mile, even those who believe such bias is fair.
Managers can take steps to alleviate this kind of workplace stress. Recent research in management science yields the following recommendations:

• develop the ability to recognize stereotyping when it happens
• avoid basing any decisions鈥攅specially those related to layoffs鈥攐n age
• provide diversity training with age in the mix
• use older workers to their competitive advantage

Our research shows why taking steps like these not only keep companies out of court but are good for business in every way.