Get a video from the 1960s of people on a train in NYC. Of course people don't interact on mass transit. The media is different, it's a bit more interactive,

Get a video from the 1960s of people on a train in NYC. Of course people don't interact on mass transit. The media is different, it's a bit more interactive, but it really hasn't changed that much. It has been a progression. More and more interaction has been mediated electronically, where it's been widely known since at least the 80's that interpersonal cues do not work in the same way. Of course non-interaction on mass transit is going to be a constant. It's socializing in the home, day to day, where things have changed. Things have changed.