From LimeSurvey Manual
Show in public statistics (public_statistics)
This attribute allows the admin to chose if the results of a particular question should be shown to the survey participant after he/she has the submitted he survey. Please note that in general to show statistics to the participant the survey setting 'Public statistics' has to be enabled!
The default setting for each question is 'No' (=Do not show statistics of this question to the user). You have to enable this for every single question if you want to show the survey statistics of that particular question to the participant after the survey submission.
- No (default)