Dr. Peterson is stuck in traffic and shows up 25 minutes aft…

Dr. Peterson is stuck in traffic and shows up 25 minutes after class has begun.  No one is in the room and a note was left on the board stating “We only wait 15 minutes for a professor, then we leave. Don’t waste our time!”  This linear approach toward time orientation (an aspect of nonverbal communication)  that is typical in the U.S. is termed: