1. Control the repetition of the questionnaire
For example, to control IP, to control multi-account login, you can also control the device, and there will usually be an encrypted token at the end of the questionnaire link to identify the unique device and the unique respondent, so even if he logs in with a different account, he can still be discovered. Super ID technology can effectively deduplicate by collecting digital fingerprint information of various behaviors such as adding devices and accounts.
2. Trap questions
Set up certain trap questions to test whether the respondent is answering the question seriously at any time, and you can also test whether the respondent is a real user. For example, the most basic age and zodiac sign matching, etc.
Reject the straightliner
Reject people who score too regularly in matrix scoring questions, such as choosing all A in the four options of ABCD, or ABABAB, ABCD, etc., which is what we call a straightliner.
4. Accurate sampling according to labels
The PowerCX Wind Chime System will give additional questions related to tag attributes and put them at the top of the questionnaire as a filter. For example, if the sample label is Beijing area, 25-40 years old, female, these three questions will be asked before the questionnaire officially starts to reconfirm whether it is a real population. It has its own sample bank of 4 million+ real people, covering all parts of the country, all industries, and all ages. At the same time, in cooperation with domestic head e-commerce and domestic head recruitment enterprises, accurate sampling can be carried out according to the user's shopping behavior and occupation tags, which can reach 4700 million e-commerce samples and 200 million workplace samples.