According to Peterson (2000), early research showed that children who had siblings developed concepts of false belief ahead of only children, however, after the effects of language ability were statistically controlled these differences disappeared.

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The Answer of According to Peterson (2000), early research showed that children who had siblings developed concepts of false belief ahead of only children, however, after the effects of language ability were statistically controlled these differences disappeared.

According to Peterson (2000), Early Research Showed That Children Who