? This is the story of the famous Cao Chong elephant in history. It is difficult to weigh an elephant because of its huge size. The dilemma is that everyone is limited by the existing knowledge and experience, and it is difficult to find a suitable scale. What makes people praise Cao Chong is his clever thinking. We can't measure the image directly, but we can measure it indirectly. Let the elephant stand on the boat and mark the scale on the surface of the boat. Then, let the elephant get off the boat and put the stone on the boat. The weight of a stone in the same proportion is the weight of an elephant. Cao Chong was like this at an early age. It's really amazing!
? As the saying goes, "it is difficult to paint a tiger's skin but a bone", many characteristics of people are hard to measure. Not as intuitive as physical measurement, especially length measurement, which is clear at a glance. Of course, when physical measurement is difficult, temperature measurement is not so easy. Don't be silly, just measure it with a thermometer. How can I measure the temperature before I have a thermometer? If you think about it a little, you will know that it is not easy for your predecessors. Psychometric regression is difficult, but it doesn't mean impossible. "Mencius?" If you answer correctly, Liang will know the weight; Degree, then know the length. Everything is natural, and the heart is what it is. "Mencius is too confident, and today's people have no reason to back down.
? Psychological measurement can only be indirect measurement, and its theoretical premise is that the human heart will always be externalized. For example, people's emotions-emotions, joys and sorrows-are generally expressed, and happiness is a vivid expression. Of course, there will be people who are particularly restrained, but that is, people will still show their emotions in different degrees. As for ability, it is even more exposed. Every move of a capable person can be felt by people around him. Experts will know if there is one!
? The principle behind the polygraph is that when a person lies, his physiological reaction can be detected by precision instruments. A polygraph expert is often a master of proposition. He must make the other side face some irritating words from a calm state through a series of step-by-step and ingenious questions. When this irritating word appears, even people who can pretend can detect it from micro-expressions and physiological reactions. For example, there is a flashlight at the crime scene, which is a neutral word for others and will not cause special reactions. But it's different for the suspect. When he heard the word "flashlight", his heart must be ups and downs. Camouflage for ordinary people, may be cheated. Can face senior experts and precision instruments, there is nowhere to hide.
? "Being wise after the event" is not a skill. The difficulty lies in the first person to eat crabs. If you want to measure personality, then the problem comes. What is personality? What is the externalization of personality? What can we measure it by? Therefore, the important content of psychometrics is the maturity of related theories (such as personality theory) and the development and compilation of measurement tools. In the process of starting from scratch, you really need super creativity.
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