title: 2D:4D digit ratio predicts delay of gratification in preschoolers.
abstract: We replicate the Stanford marshmallow experiment with a sample of 141 preschoolers and find a correlation between lack of self-control and 2D:4D digit ratio. Children with low 2D:4D digit ratio are less likely to delay gratification. Low 2D:4D digit ratio may indicate high fetal testosterone. If this hypothesis is true, our finding means high fetal testosterone children are less likely to delay gratification.
authors.affiliation: Graduate Program in Economics, Federal University of Santa Catarina, Florianopolis SC, 88049-970, Brazil.
authors.forename: Sergio
authors.initials: S
authors.lastname: Da Silva
authors.affiliation: Federal Institute of Minas Gerais, Formiga MG, 35570-000, Brazil.
authors.forename: Bruno
authors.initials: B
authors.lastname: Moreira
authors.affiliation: Graduate Program in Economics, Federal University of Santa Catarina, Florianopolis SC, 88049-970, Brazil.
authors.forename: Newton
authors.initials: N
authors.lastname: Da Costa
mesh_terms: D002648:Child; D002675:Child, Preschool; D065786:Delay Discounting; D005260:Female; D005333:Fetus / Q000378:metabolism; D005385:Fingers / Q000033:anatomy & histology*; D006801:Humans; D008297:Male; D013739:Testosterone / Q000378:metabolism
chemical_list: D013739:Testosterone