Final answer:
To ensure each participant only completes your survey once, enable a setting that restricts respondents to one submission via unique identifiers or single sign-on mechanisms, balancing integrity and anonymity. Carefully selecting a representative sample over voluntary, self-selected samples is crucial for reliable data.
Step-by-step explanation:
Ensuring Unique Survey Responses
If you want each person to only take your survey once, you should check for a setting that limits respondents to a single submission. This can often be achieved by enabling a feature that tracks unique identifiers, such as an IP address or requires a unique code for survey access. Additionally, the use of a single sign-on mechanism or authenticating through an external service, like an email invitation, can help ensure that each survey is completed only once per person. It is essential to configure these features appropriately to maintain the integrity of your survey data. However, be mindful that any limitation put in place should respect the privacy and anonymity of respondents, if such conditions are promised or required for your survey.
Sampling data carefully and avoiding biased samples are fundamental to achieving accurate research results. By limiting survey submissions to one per person, you can help prevent self-selected samples, which often lead to unreliable data, as these are likely to only include responses from people with a particular interest in the survey. As such, it is better to strategically select a representative sample rather than relying on those who volunteer, as this can help avoid a selection effect, which might lead to distorted survey results.