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1963年,罗森塔尔和福德告诉孩子实验者,用来进行迷宫实验的老鼠来自不同的种系:聪明鼠和笨拙鼠。实际上,老鼠来自同一种群。但是,实验结果却得出了聪明鼠比笨拙鼠犯的错误更少的结论,而且这种差异具有统计显著性。对孩子实验者测试老鼠时的行为进行观察,并没发现欺骗或做了其他使结果歪曲的事情。似乎可以推断,拿到聪明鼠的孩子比那些拿到笨拙鼠的不幸孩子更能鼓励老鼠去通过迷宫。也许这影响了实验的结果,因为实验者对待两组老鼠的方式不同。
In 1963, Rosenthal and Ford told the experimenter that the mice used for the maze experiment came from different germ lines: clever rats and stupid rats. In fact, mice come from the same group. However, the experimental results led to the conclusion that smart mice made fewer mistakes than clumsy mice, and the difference was statistically significant. Observing the behavior of the child experimenter when testing the mouse did not reveal any fraud or other distortions. It seems to be inferred that a child who gets a smart mouse encourages the mouse to go through the maze more than the unfortunate boy who gets the stupid mouse. This may affect the outcome of the experiment, because the experimenter treated the two groups of rats in different ways.