[n4r9]

I fonud the following Wikipedia section somewhat useful for understanding the context here: https://en.wikipedia.org/wiki/Bouba/kiki_effect#Implications...

Annoyingly, very few of the citations are accessible. But the gist as I understand it is that this challenges various proposed explanations for the Bouba-Kiki effect, for example that it relates to human physiology or has a human-specific neurological basis.