default value of user experience

In the interactive ui design process involves the default system default value, it plays a guide, remediation, publicity and so on. The word "default" comes from the terminology of the engineer, because the system has a lot of default operations, such as front-end reconstruction CSS default font is Arial. In the above example, the interaction between the thermostat and the human body has a default value: 38 degrees. This value as a default, reduce the user operating learning costs; forward to lower the temperature, raise the temperature back, play a benchmark role. Through the "default value" to achieve the interactive design easy to take, flexible and efficient, humane principles of user experiene.
With the default value of the user will not feel panic, that is, to the user a normal, in reality we can see such an example, the default value is on the insurance - security, the computer default is off - province Electricity. This kind of normal in the Internet to play a role in the role, such as the default site will always choose to accept the skin, the user did not pay attention to this will have been used to feel can be amended, but not a default value to the user To choose, greatly increase learning costs.