It happened in 1995. Boston cop Kenny Conley was pursuing a suspect and ran right past other cops beating a man. Conley later testified that he never saw the beating. He was convicted of [--1--] of justice, and sentenced to 34 months in prison.

But did he tell the truth that he saw nothing? Very possibly, says a study in the journal i-Perception.

Researchers had individuals "chase" a "runner" for on a college campus at night. The subjects followed the runner at a distance
of 30 feet and had to count the number of times he touched his head. Each chase passed a [--2--] designed to look like
the scene Conley rushed by: two actors staged a beatdown on a third man, with [--3--].

And two-thirds of the subjects did not recall seeing the fake fight. Even when repeated during the day, only 60 percent saw the beating.

Such a gap in [--4--] is called inattentional blindness. It occurs when increased demands on one's attention decrease the ability to notice something unexpected. And a dangerous consequence is that we don’t believe we miss as much as we actually do.
【视听版科学小组荣誉出品】
perjury and obstruction staged fight kicking, punching and yelling perception
确定你有亲眼目睹吗? 这件事发生在1995年。当时波士顿警官肯尼•康利在追捕一名嫌犯的过程中刚好经过其他警官殴打一个男人的现场。之后证实康利确实没有看到这次殴打。于是他被定罪为伪证罪和妨碍司法公正罪，同时判处34个月有期徒刑。 但是他真的什么都没有看见吗？《i-Perception》期刊上的一项研究显示，这其实是很有可能的。 研究人员让受试人员在晚上的一个校园里“追捕”一个“逃犯”。受试人员与逃犯有30英尺的距离，而且需要计算他碰触了多少次他的脑袋。每次追捕都会经过一个事先排演的打斗现场，正如康利所经过的一样：两名演员用杀威棒“拳打脚踢”第三名演员，并伴有喊声。 然而，有三分之二的受试人员并没有发现这个假的打斗现场。即使是在白天重演这一幕，也仅有60&的人注意到打斗。 这种感知空隙被称为“无意视盲”。当我们将注意力都集中在我们的需求上时，就会减弱感知到其他意外事物的能力，这时就会产生“无意视盲”。而这样一个危险后果就是我们不会相信我们错过了什么，即使那是事实。