Gwern had responded to Elizabeth's question about creativity with the following:

A good anthology to read is Creativity, ed Vernon 1970 - it's old but it shows you what people were thinking back when Torrance was trying to come up with creativity tests, and the many psychometric criticisms back then which I'm not sure have been convincingly resolved.

I'm not sure whether Elizabeth has already read it, but I'd be interested in reading the highlights from that if anyone was up for distilling it down into something more manageable.