Don't expect a big thank-you at work this week. While people may express gratitude when they gather at Thanksgiving, showing appreciation is far from traditional at the office.

Research suggests that employees who feel appreciated are more productive and loyal. But that message hasn't reached many of those in charge. Some bosses are afraid employees will take advantage of them if they heap on the gratitude. Other managers believe in thank-yous but are nervous about appearing awkward or insincere