Domain specificity and variability in cognitive development.

@article{Gelman2000DomainSA,
  title={Domain specificity and variability in cognitive development.},
  author={Rochel Gelman},
  journal={Child development},
  year={2000},
  volume={71 4},
  pages={854-6; discussion 860-1}
}
There are core-specific and noncore-specific domains of knowledge, but only the core-specific domains benefit from innate skeletal structures. Core skeletal domains are universally shared, even though their particular foci may vary; individuals vary extensively in terms of the noncore domains they acquire.