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Web-based Surveys

Web-based Surveys. Patty Nordstrom March 27, 2008. Types of Web-based Surveys. Non-probability Entertainment surveys Self-selected surveys Volunteers from Internet users

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Web-based Surveys

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  1. Web-based Surveys Patty Nordstrom March 27, 2008

  2. Types of Web-based Surveys • Non-probability • Entertainment surveys • Self-selected surveys • Volunteers from Internet users These surveys are usually for voting on a particular questions or an instant poll, they are not generalized to the greater population

  3. Probability-based • Intercept • Every nth visitor to a site • Respondents are from an e-mail request • Mixed-mode • Pre-recruited panels *As with all survey research, non-respondents are a problem

  4. Presentation • Screen by screen • Only one question per page, respondent must answer the questions before they can continue • Scrolling • Respondent can see, if not the entire questionnaire, more than one question.

  5. Advantages • Cost • Faster response rate • Easier to send follow-ups • Easily downloaded in to a spreadsheet or data analysis program

  6. Advantages • Questions can be easily randomized • Complex skip patters • Drop down boxes

  7. Concerns • Browsers • Computer expertise of the respondent • Data Security • Randomization • Privacy issues • E-mail invitations considered spam

  8. Common Problems Encountered • Technical problems • Usability problem • Programming errors

  9. Sources of Errors • Sampling • Coverage • Non-respondents

  10. Design of Web Survey • One item per page • Scrolling • Simple is better • Design should fit the purpose

  11. General Principles • Pretest • Include an introduction, include consent if required • If the survey is long, divide it into sections • Use open-ended questions sparingly

  12. Principles of Design for Web Questionnaires (Dillman, Tortora, Bowker) • Welcome screen • First question fully visible • Conventional format similar to paper • Limit line length • Provide instructions for computer actions

  13. Principles of Design for Web Questionnaires (Dillman, Tortora, Bowker) • Welcome screen • First question fully visible • Conventional format similar to paper • Limit line length • Provide instructions for computer actions

  14. Principles of Design for Web Questionnaires (Dillman, Tortora, Bowker) • Instructions with individual questions, not at the beginning • Do not force answers unless necessary • Scrolling • Progress bar • Avoid questions structures that have known measurement problems

  15. What we do at the SRC • Work with PIs to collect data using web-based survey • Use Perseus software to create web-based survey

  16. Considerations • Who is your audience? • Is using web-based surveys appropriate? • Multi-modal • Cost

  17. Technical Support • Programmer/analysts on the staff • Hardware to support data collection

  18. Types of Surveys • Open • Anyone can answer access the survey and answer the questions • Closed • Unique IDs are assigned to individuals

  19. Results Data is collected in a table Provide the data in various formats to PI Database (.mdb) SPSS (.sav) Tab separated (.tsv, .txt) Comma separated (.csv) Excel (.xls)

  20. Conclusions • Web-based surveys are a tool to collect data • Sound principles must back up any type of data collection

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