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If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
Customer service
All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
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Improving the accuracy of a survey is the focus of Mark S. Litwin's book, which shows how to assess and interpret the quality of survey data by thoroughly examining the survey instrument used. He explains how to code and pilot test new and established surveys. In addition, he covers issues such as: how to measure reliability (including testretest, alternate form, internal consistency, interobserver and intraobserver reliability); how to measure validity (including content, criterion and construct validity); how to address crosscultural issues in survey research; and how to scale and score a survey.
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This product may contain chemicals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
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⚠️ California Proposition 65 Warning: Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.