This study investigated whether one hundred and thirty-five 3- to 6-year-old children exhibit a yes bias to various yes-no questions and whether their knowledge status affects the production of a yes bias. Three-year-olds exhibited a yes bias to all yes-no questions such as preference-object and knowledge-object questions pertaining to objects, and knowledge-face questions pertaining to facial expressions. Four-year-olds tended to say "yes" only to knowledge-object questions. Five-year-olds did not show any strong response tendency. Six-year-olds exhibited a nay-saying bias to knowledge-face questions. Also, 3-year-olds could indicate the correct option when asked questions with 2 response options. It suggested that 3-year-olds tended to inappropriately say "yes" to yes-no questions, although they knew the answers to the questions. The mechanism of a yes bias was discussed.
We investigated whether children's response tendency toward yes-no questions concerning objects is a common phenomenon regardless of languages and cultures. Vietnamese and Japanese 2- to 5-year-old (N = 108) were investigated. We also examined whether familiarity with the questioning issue has any effect on Asian children's yes bias. As the result, Asian children showed a yes bias to yes-no questions. The children's response tendency changes dramatically with their age: Vietnamese and Japanese 2- and 3-year-olds showed a yes bias, but 5-year-olds did not. However, Asian 4-year-olds also showed a yes bias only in the familiar condition. Also, Asian children showed a stronger yes bias in the familiar condition than the unfamiliar condition. These two findings in Asian children were different from the previous finding investigated North American children (Fritzley & Lee, 2003). Moreover, there was a within-Asian cross-cultural difference. Japanese children showed different response tendencies, which were rarely observed in Vietnamese children. Japanese 2-year-olds and some 3-year-olds showed a "no answer" response: they tended not to respond to an interviewer's questions. Japanese 4- and 5-year-olds also showed an "I don't know" response when they were asked about unfamiliar objects. Japanese children tended to avoid a binary decision. We discussed the cross-cultural differences.
This study investigated the situations in which children say `yes' in response to yes-no questions. Japanese-speaking children aged 2;0—3;11 ( N=38) were asked yes-no questions by their own mothers at home. Children showed a strong yes bias. The results, combined with those of earlier studies, suggest that a yes bias is a general phenomenon. In addition, young Japanese children showed Japanese-specific response tendencies.
The aim of the present study was to investigate how young children reduce a yes bias, the tendency to answer 'yes' to yes-no questions. Specifically, we examined three possible factors: verbal ability, inhibitory control and theory of mind. Results revealed that verbal ability and inhibitory control were strongly associated with a yes bias even after controlling for age. Regression analyses revealed that these two factors significantly predicted a yes bias. Theory of mind was not significantly correlated with a yes bias. The results indicate that young children may have to inhibit a dominant 'yes' response when they are supposed to respond 'no'. The development of verbal skills may reduce young children's yes biases.
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