In the cold winter, when you are in an unfamiliar environment, you often encounter water temperature adjustment. The plot is generally like this: you adjust to a scale that you think is suitable, and after you put the water for a while, you find that it is still whatsapp Database cold, so you slowly increase the hot water, several times After adjustment, I simply turned the hot water to the maximum, but the result was too hot, enlarge the cold water, too cold, put a small amount of cold water, too hot, put a small amount of hot water... In the end, it was suitable, even if we did whatsapp Database not have a cold, we began to hate this shower. More reasonable is a product called "thermostatic faucet", which gives a default water temperature that users do not need to preset: open is 38 degrees, this value is the comfortable point for us to take a bath.
When it gets hot, there is a threshold temperature of 40 degrees. Above this temperature, the skin will be scalded. If you really want to increase it, you can press and hold a red preset button. All operations are simple and straightforward - most users whatsapp Database lift the switch and go straight to the shower. Figure 1. Uncooperative showers encountered in unfamiliar environments in winter Defaults in Interaction Design In the process of interaction design, default values are required for system defaults, which play the role of guidance, remediation, and publicity. The word "default value" comes from engineer's terminology, because the system has many default whatsapp Database operations, such as the default font in front-end refactoring CSS is sari. In the example above, there is a default value in the interaction between the thermostat and the human being: 38 degrees.
This value is used as the default state to reduce the cost of user operation and learning; it reduces the temperature forward and raises the temperature backward to play a benchmarking role. Through the "default value", the principles whatsapp Database of easy access, flexibility, high efficiency, and humanization in interaction design are realized. With the default value, users will not feel panic, which is to give users a normal state. In reality, we can also see such examples. The default value of knives and guns is insured - safe, and the default value of computer is whatsapp Database closed - save Electricity. This kind of normality plays an inducing role in the Internet. For example, the default skin of a website will always choose something that everyone can accept.