@article {3773, title = {At 4.5 but not 5.5 years, children favor kin when the stakes are moderately high}, journal = {PLOS ONE}, volume = {13}, year = {2018}, month = {08/2018}, chapter = {e0202507}, doi = {10.1371/journal.pone.0202507}, url = {http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0202507}, author = {A C Spokes and Elizabeth S Spelke} }