For the past six months, Linda's performance level has declined. She has been making and receiving many personal phone calls during work time. In addition, Linda has been leaving work early whenever possible and has called in sick two or three times per month for the past three months. As a result, accounts are left unattended and work is piling up on her desk. Linda has made more mistakes than usual. Her usually helpful demeanor is gone, and she is sullen and withdrawn.