Sandra Millstone, the CEO of Excalibur Manufacturing Company, had concluded that the company would have to reduce its employee group by 10 percent as the industry was severely hit by the ongoing economic recession. She spent over 30 hours preparing charts, tables, graphs, diagrams, and other forms of visual aids for her presentation to the employees about the upcoming reduction in force so that they could understand the reason and plan their next move. By the time that Sandra had finished the presentation to the employees, she had spoken for one and one-half hours, shown 14 visual aids, and no one asked a question. The employees were probably dealing with which of the following barriers to effective communication?