1. a person who does not respond to a survey, questionnaire, or research study
Usage: research; statistics

1. not responding or failing to respond
Usage: formal

Examples

• The survey had a 30% nonrespondent rate, which may affect the validity of the results.
• Researchers tried to contact each nonrespondent at least three times.
• The study excluded nonrespondent participants from the final analysis.
• Nonrespondent bias can skew research findings significantly.
• The patient remained nonrespondent to the medication after two weeks.
• Follow-up calls were made to reduce the number of nonrespondent cases.