"Dopamine provides a filtering effect that may help you concentrate on the novel object or pleasurable stimulus," Bamford says.

“多巴胺提供一种过滤效果，让你可以对新鲜事物或愉悦的刺激集中注意力，”Bamford说。

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Experiment 4 presented dynamic picture materials, examining stimulus types and the consistency of semantic category to affect the detection of the unexpected object.

实验四采用动态呈现的图片材料，考察注意定势与刺激类型一致性对觉察非预期物体的影响。

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Experiment 3 confirmed that the interaction of bottom-up stimulus features and top-down attentional set affected the the probability of Inattentional Blindness of the unexpected object.

实验三显示自下而上的刺激特征和自上而下的注意定势相互作用，影响非预期物体的觉察率。

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Obama also has encountered resistance from Democrats who are reluctant to support his economic stimulus package because they object to his hard line against earmarks and his proposed tax breaks for businesses.

CNN: Commentary: Guess who's not giving Obama full support?

This year, Congress would probably object mightily to another round of stimulus, given its new determination to cut government costs in efforts to tackle the record budget deficits.

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