Criminal Psychology Book 1

Chapter 68: Three Graves 31

"How do you catch this, do you pull the net for investigation?" Jiang Chao sighed. "I honestly don't think I have enough time for inspection."

"Yeah, so someone needs to come out and talk."

"what?"

"If we are sure there will be the next live broadcast, that is to say, there are still people who may commit crimes in this school or in this entire city, we can find these people by some methods and talk."

"The question is, are there any quick ways to find someone in psychology?"

"To be precise, it's math."

Lin Chen took out three pieces of paper from his pocket, which were what he had been carrying with him today. Now it seems that he is very fortunate that he did not throw away these pieces of paper because of trouble.

"Used by the dynasty," he said to Xing Conglian.

"Why so polite, as long as it doesn't kill you, you can use it." Xing Cong even answered with a smile.

The teenager sitting aside raised his head from the screen, holding a pen on his mouth, apparently still studying how to word it, in order to catch those perverts: "Boss, I am easy to rebel, do you know?"

Lin Chen laid three sheets of paper on the table and said, "In fact, through the results of mmpi, we found that Wang Shishi, Xu Haozhen, and Jiang Liu had similar personality traits. Then we can use this feature in turn to screen for possible groups. . "

"Find out who might participate in the next live broadcast?" Wang Chao lay back on the table the next second. "There are 30,000 teachers and students at Guangyongchuan University. Want to find three people to participate in the next live broadcast? Achen Don't say, this is really a haystack. "

"You mean, first screen out those with a social introvert of 70 or more?"

Lin Chen nodded. After the incident, he didn't have any surprises about Xing Lianlian remembering the keywords and scoring criteria.

He glanced at the dynasty, and the boy consciously spit out the signature pen in his mouth, not forgetting to wipe the bite with a t-shirt.

After receiving the pen, he drew a large circle on the paper, explaining: "Suppose this is a socially introverted high-scoring crowd ..." Then he drew a small circle intersecting with the large circle. " This is a possible offender, "he said, smoothing out the intersection of the two circles," this is a potential group we may find out. "

"I got it! This is for me to hit a library first, get out the information of this test, and then screen out the students who scored 70 or more. How many people are there?"

"Hit what library." Xing Conglian knocked on the dynasty, "We can adjust the data through due process."

"70 points is roughly two standard deviations in the mean, so conservatively estimate that there will be 4% of the abnormal population." Lin Chen answered.

"Then there will be 1,200 people in Sichuan Yongchuan University!" The Dynasty exclaimed.

"Is there any way to narrow it down?" Xun Conglian asked.

"Yes," Lin Chen replied simply, "another personality test."

Several of the suicides in this case showed the characteristic of a major change in personal personality, so the degree of suspiciousness was high for students who had major changes in scores in the second personality test.

"I see." Xun Conglian said.

"But there is still a problem." Lin Chen looked at Xun Conglian. "Suppose we conduct a personality test on our students with great fanfare.