SmartTech's CEO, Gary, often honors employees who have demonstrated the company's core values. SmartTech holds a conference each year, where one employee is honored in several values categories that include (1) challenge; (2) move fast; (3) be open and straightforward; (4) teamwork for results; and (5) take responsibility. Rather than posting core values someplace everyone passes by each day, Gary finds that providing ________ rewards once each year provides the message to all employees that these are important values.