title: Young children do not succeed in choice tasks that imply evaluating chances.
abstract: Preverbal infants manifest probabilistic intuitions in their reactions to the outcomes of simple physical processes and in their choices. Their ability conflicts with the evidence that, before the age of about 5years, children's verbal judgments do not reveal probability understanding. To assess these conflicting results, three studies tested 3-5-year-olds on choice tasks on which infants perform successfully. The results showed that children of all age groups made optimal choices in tasks that did not require forming probabilistic expectations. In probabilistic tasks, however, only 5-year-olds made optimal choices. Younger children performed at random and/or were guided by superficial heuristics. These results suggest caution in interpreting infants' ability to evaluate chance, and indicate that the development of this ability may not follow a linear trajectory.
authors.affiliation: Center for Experimental Research in Management and Economics, DCP, University IUAV of Venice, Italy. Electronic address: vgirotto@iuav.it.
authors.forename: Vittorio
authors.initials: V
authors.lastname: Girotto
authors.affiliation: Center for Experimental Research in Management and Economics, DCP, University IUAV of Venice, Italy.
authors.forename: Laura
authors.initials: L
authors.lastname: Fontanari
authors.affiliation: Laboratory of Cognitive Psychology, CNRS and Aix-Marseille University, France.
authors.forename: Michel
authors.initials: M
authors.lastname: Gonzalez
authors.affiliation: Center for Mind/Brain Sciences, University of Trento, Italy.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Vallortigara
authors.affiliation: Laboratory of Cognitive Psychology, CNRS and Aix-Marseille University, France.
authors.forename: Agnès
authors.initials: A
authors.lastname: Blaye
mesh_terms: D002648:Child; D002657:Child Development; D002675:Child, Preschool; D002755:Choice Behavior; D005260:Female; D000066506:Heuristics; D006801:Humans; D008297:Male; D011336:Probability; D011340:Problem Solving
keywords: Infants; Preschoolers; Probabilistic cognition; Proportional reasoning; U-shape development