Unless I'm missing something about what you're asking, your suggestion is exactly right. You wrote:
IF >1 THEN "More", ELSE "Less" END; move that field to "color" mark
I used this calculation applied to color:
IF [Chose Sentence Field] > 1 THEN "more" ELSE "less" END
And it produced this:
I still cannot get this to work, unfortunately. I do not know why...
But thank you for trying to help!