Translations:Participant settings/9/en
From LimeSurvey Manual
Anonymized responses
This option allows you to determine whether responses to your survey are matched up with information from your survey participants table, or kept "anonymous". The default is "No". If you choose "Yes", then your survey is set to anonymize responses - there will be no way to connect answers and participants. Even the admin will not be able to link response data and participant data. However, you will always be able to specifically view each response entered by your participants in the survey. Thus individual and anonymous analyses can still be done.