The boy might instead kick the dog and think he hates the dog because that's a more acceptable target.

孩子可能会去踢狗，觉得狗很可恨,因为狗是可以接受的替代性目标。

耶鲁公开课 - 心理学导论课程节选

And it turns out that the dog— when they zapped part of its brain, its leg would kick up.

结果是那只狗,当研究者们电击某个大脑区域时,狗的四肢便会乱踢起来

耶鲁公开课 - 心理学导论课程节选