Numerical thought with and without words: Evidence from indigenous Australian children
Brian Butterworth, Robert Reeve, Fiona Reynolds, Delyth Lloyd
Proceedings of the National Academy of Sciences of the United States of America | NATL ACAD SCIENCES | Published : 2008
We thank Robert Hoogenraad and Mary Laughren, experts in Warlpiri language and culture; Barbara Wilson and Julie Waddy, who provided much-needed assistance and support on Groote Eylandt; Sue McAvoy, Frank Atkinson, and Gina Atkinson for their help and support at Willowra; and Nadja Reiter of the Northern Territory Education Department, who helped us overcome many tricky problems. Edith Bavin helped us in the early stages of the study, and Judi Humberstone contributed to the statistical analyses. We particularly thank the children and adults of the indigenous communities in which we worked, who gave their time freely, patiently, and with good humor. We also thank an anonymous reviewer for suggesting that we use Bayesian likelihood ratios to show an absence of difference between numerical response distributions. The research was supported by a grant from the Leverhulme Trust (to B.B. and R.R.).