<p>I’m with elemenope:</p>
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<p>As a parallel, my S is a freshman majoring in Screenwriting at a film school.
They have several first assignments (for all the future hopeful directors, screenwriters, cinematographers…) that require them to make a short film, USING NO DIALOGUE. That is to teach them to use the visual image to tell their story. It’s an exercise; by limiting one avenue for storytelling (speech), they want to strengthen another (visual).</p>
<p>So I interpreted the “radio audience” idea as lmnop did, an exercise that makes the student shut down one normal sense we always rely upon (visual) so the students will push harder on themselves to paint the picture with words.</p>
<p>I also remembered what they did at age 6 when my kid was diagnosed with a lazy eye (not using one eye to process any information…) with 20/90 vision in it. So they patched the strong eye, requiring him to use the weak eye more. Same idea. He looked like a pirate, but did get to almost 20-20 in that lazy eye after a year.</p>