IV. The passage below contains $ mistakes (only ONE word for ONE mistake from 46 to 50. Find out the mistakes and correct them. Write the correct answers on your answer sheet.

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Stories about how people somehow know when they are being watched

have been going around for years. However, few attempts have been made to investigate the phenomena scientifically. Now, with the completion of the

largest-ever study of the so-called staring effect, there is impressive evidence the that this is a recognizable and genius sixth sense. The study involved hundreds of children. For the experiments, they sat with their eyes covered and with their backs to other children, who were told to either stare at them or look away. The results consistently showed that the children who could not see were able to tell when they were being stared at. In a total of more than 18,000 trials carried out worldwide, the children correctly sensed when they were being watched most 70% of the time. The experiment was repeated with the added precaution of putting the children who were being watched outside the room. This was done just in addition there was some cheating going on, with the children telling each other if they were looking or not. This prevented the possibility of sounds being transmitted between the children. The results though less impressive were more or less the came.

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to it during this time, of course, and (52) ______ variety of grounds