REDCap 提供了强大的功能，用于在线调查问卷。
1. Survey settings
Project>Instrument> Use enhanced radio buttons and checkboxes? (Yes) Question Numbering? (No) Question Display Format? One section per page (multiple pages) > Display page numbers at top of survey page (Yes) > Hide the 'Previous Page' button (i.e., Back button) on the survey page (Yes) For 'Required' fields, display the red 'must provide value' text on the survey page? (No)
Survey Termination Options: Auto-continue to next survey: > Redirect to a URL > Survey Completion Text
2. [Calculated Field] 改变公式时，会出现错误， 修复：到 Applications/Data Quality, Execute Rule#H 或其他。 View->[Fix calcs now]
3. 开始和结束可以加 @HIDDEN @NOW, 收集客户端时间。
4. Data Collection -> Survey Distribution Tools -> get URL
5. Export and Import data
Backup - export data
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Project Home and Design -> Data Dictionary
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Download the current Data Dictionary (.csv)
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Print Codebook (.pdf)
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Application -> Data Exports, Reports, and Stats
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All data -> Export Data -> CSV / Microsoft Excel (raw data) -> Download
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Stats & Charts -> Print Page
Recover - import data
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Create a New Project
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Project Home and Design -> Project Setup ->Enable surveys
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Data Dictionary -> Upload File (from the backup Data Dictionary) -> Commit Changes