And what has happened is they're using this bodily cue of

而事实是他们用心跳作为线索
their heartbeat to infer that that's who they find more attractive.

来认定哪位美女更有吸引力
Now, here is the twist.

问题就在这里
They're not actually listening to their heartbeat.

他们听到的并不真的是自己的心跳
They're listening to a tape recording of a heartbeat.

他们听的是心跳的录音
And the experimenter is back there with the speed knob

研究人员在后面用旋钮控制心跳速度
And at random intervals he just speeds up the tape of their heart

在任意间隔加速心跳声
and then slows it down.

然后减慢
And it doesn't matter which slide

与哪张幻灯片无关
He speeds up the tape of the heartbeat on,

当他加速心跳录音时
That's the one the subject is more likely to think is

被试就认为那个就是他的
the person of their dreams, the person they're attracted to.

梦中情人最吸引他的人