回复：今晨儿子转来一篇文章。家有小娃且大人“动手能力强”者可

来源: Green_sky 于 2009-09-27 09:05:44 [] [旧帖] [给我悄悄话] 阅读数 : (205 bytes)

The research might have typical flaw:
The fact that A is related to B does not necessarily mean A causes B. For example, the parents who use physical punishment MIGHT have lower IQ's than those don't.

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