Basic methods of data acquisition

The basic methods of data collection include questionnaire, field observation, interview, literature research, experimental design, web crawler and so on.

1. Questionnaire

By designing and distributing questionnaires, people's opinions, opinions and feedback on specific topics or problems are collected.

2. Field observation

Directly observe and record events, behaviors and phenomena. On-the-spot observation is a way for observers to use their sensory organs purposefully and systematically or use scientific observation tools to actively understand social phenomena in a natural state.

3. Interview

Talk with individuals or groups face to face or remotely to collect their experiences, opinions and opinions. It is the vocabulary of the press, that is, reporters conduct observation, investigation, interview, recording, photography, audio recording, video recording and other activities to obtain news materials. It is a way of collecting and collecting media information, usually through face-to-face communication between journalists and the people who get the information.

4. Literature research

Collect relevant information and data by reading existing books, papers, reports and news articles.

5. Experimental design

By designing laboratory experiments or field experiments, data are collected under the condition of controlling variables. Experimental design refers to a planned research, including a series of intentional changes to process elements and their effects, and statistical analysis of these results to determine the relationship between process variations, thus changing the process.

6. Web crawler

uses computer programs to automatically collect data from the Internet. Is a program or script that automatically crawls information from the World Wide Web according to certain rules. Other less commonly used names are ants, automatic indexes, simulators or worms.