“…Importantly, this sensitivity appears to support early categorization, word learning, and memory more generally speaking (e.g., Bauer and Mandler, 1989 ; Booth and Waxman, 2002 ; Booth, 2008 , 2009 ). For example, 3-year-olds are more likely to remember novel labels if their novel animal or artifact referents are described in terms of their causal properties than if they are described in terms of their causally-irrelevant properties ( Booth, 2009 , 2014 ; also see Kemler Nelson et al, 2008 ). But why does causal information have this facilitative effect on learning?…”