You forgot to mention amongst young children as well!!

The ideal scenario is to have a peaceful enviroment free from distractions ... however, anything is possible. Take Pete and Paul who have given countless demonstrations on PR on TV,radio in front of sceptics!! They have always succeeded ... so if they can perform under that type of stress ... then PR'ing in a busy enviroment is possible!
Secret is to have the ability to 'shut out' outside interferences ... as with anything, the more you're subjected to that enviroment, your body will adapt in time.
Humbily,
Michael Saikali