Read more about the study and the findings.A new study published in the December issue of the American Sociological Review shows that working moms juggle multiple roles at once, and they are unhappy about it. While this may not seem like news to many - especially working moms - there is now empirical evidence to back up what many have felt for a long time. The researchers used data collected from 368 U.S. mothers and 241 fathers in dual-earner, middle- to upper-middle-class families in 1999 and 2000. The parents held professional jobs and managerial positions, representing a segment that's under considerable time pressures. They found that mothers multitask more often than fathers when they do housework - doing dishes while making dinner, for example -- and they feel stressed and conflicted about it. These findings, the researchers suspect, are likely due to social expectations. While today's generation of fathers is expected to be involved in housework and child care, women often still play a primary role.