Shinya Kameshima

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The purpose of the current study was to examine the role of theory of mind in fairness-related behavior in preschoolers and to introduce a tool for examining fairness-related behavior in children. A total of 68 preschoolers played the Ultimatum Game in a face-to-face setting. Acquisition of theory of mind was defined as the understanding of false beliefs(More)
OBJECTIVES This study aimed to examine the role of emotions in rejection of unfair offers in an ultimatum game, which is of interest in neuroeconomics of fairness. METHODS Thirty-seven participants played a one-shot ultimatum game as responders and decided whether to accept or reject the unfair offers by the proposers. Salivary alpha-amylase (sAA) was(More)
Sleep behavior has been related to both child and environmental factors, but the relative importance of these factors is not yet clear. This study was an examination of the relation of diurnal sleep patterns to perinatal risk, infant temperament, home environment, parenting stress, emotional support, and social class. Twenty-three adolescent and 23 single(More)
We conducted a simple resource allocation game known as the ultimatum game (UG) with preschoolers to examine the role of cognitive and emotional perspective-taking ability on allocation and rejection behavior. A total of 146 preschoolers played the UG and completed a false belief task and an emotional perspective-taking test. Results showed that cognitive(More)
The purpose of this study was to examine the effect of peer monitoring on generosity in boys and girls aged 6-12 years. A total of 120 elementary school students played a one-shot dictator game (DG) with and without peer monitoring by classmates. Children decided how to divide 10 chocolates between themselves and a classmate either in a condition in which(More)
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