I've never heard of that, Bath, but I have heard artists speak about stifling children's creativity by correcting their work and having suns in the same left hand corner, all looking the same, etc. From this, I learnt not to tell my DD what to do when she's painting (and subsequently, while her sun was up in the top corner - the only uncovered spot on the canvas - it was pink with yellow lines through it, the people were taller than the tree and the baby was lying besider her name. And everyone had multi-coloured arms, legs, faces and mouths. ). I'm glad I saw this before she started drawing, because I'm not sure I would have naturally gone this way, even though I actually love to paint and draw!