Dr Hyde said gender differences accounted for either no or a very small effect for most of the psychological variables examined.

海德博士认为，性别差异对研究中所观察的大多数心理变量没什么影响，或者影响非常小。

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The mental toll is greater on mothers with pre-school age children, the authors wrote. The psychological effect on them was found to be four times greater than for men with children of the same age.

作者写道，学龄前孩子的母亲感受到的压力更大，她们所承受的心理压力要比有同样年龄孩子的男性要高出四倍。

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When you make decisions, one strong cognitive bias is the bandwagon effect, a well-known psychological phenomenon (see Resources for a description).

决策的时候，一种很强的认知偏见是跟风效应(Bandwagon effect)，即一种众所周知的心理现象(请参阅参考资料)。

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Republicans argue that even though the bulk of Bush's tax cut won't be felt for years, the entire package would have an immediate, positive psychological effect on the markets and consumers -- if Congress passes it.

CNN: Democrats say Bush's comments helped bring downturn

And while that may sound good for bargain hunters, and perhaps even more importantly for Japan's ageing households receiving fixed pension incomes, if prices continue to fall for a prolonged period, it actually has a negative psychological and business effect, some economists argue.

BBC: Q&A: Bank of Japan's inflation target

Such acts are difficult for the authorities to prevent, and images of them can have a powerful psychological effect among sympathisers.

ECONOMIST: China��s restive Tibetan regions