The main exception to this was the finding that only children are generally higher in achievement motivation.

The main exception to this was the finding that only children are higher in achievement motivation, largely because their greater share of parental attention translates into increased parental scrutiny: This scrutiny, especially as compounded by only children's access to a greater share of parental resources, exposes them to greater absolute quantities of both reward when they exceed parental expectations and punishment when they fall short.

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