1, Ebbinghaus's memory experiment.
Ebbinghaus, a famous German psychologist, drew a famous forgetting curve based on meaningless syllables, and explained the law of forgetting according to the retention effect. Ebbinghaus's forgetting curve shows that forgetting begins immediately after learning, and the initial forgetting speed is very fast. With the passage of time, the speed of forgetting gradually decreases, and it will not be forgotten after reaching a certain level. It can be seen that the process of forgetting is unbalanced, and its law is fast first and then slow, showing negative acceleration.
2. Permanent experiment of objects.
The experiment of object permanence is an experiment made by Piaget, a Swiss psychologist, to prove the permanent development of object. He gave the baby a lovely toy, and the baby would reach for it. But when adults cover toys with a piece of cloth before grasping them, they will stop grasping and turn their attention elsewhere, as if the toys no longer exist. Babies will only continue to search after 9 months of birth, which is the beginning of obtaining the permanence of objects.
3. Sanshan experiment.
The experimental materials are three kinds of rockery models with different heights, sizes and colors. In the experiment, children were first asked to observe three mountains from four angles of the model, then they were asked to sit facing the model and put a doll on the other side of the mountain. Ask the children to point out which of the four pictures is the mountain that the doll sees. It turns out that children can't finish this task. They can only describe the shapes of the three mountains from their own perspective. Piaget used this to prove the self-centered characteristics of children in the pre-operation stage.