When asked 72% of participants believed the results of a primary election woud not influence their presidential vote.However, 52% said it would influence and therefore must be affecting other voters.
We believe mass media has a much stronger impact on others than it does on us.
See the full study here :
W. PHILLIPS DAVISON, The Third-Person Effect in Communication, Public Opinion Quarterly, Volume 47, Issue 1, SPRING 1983, Pages 1–15, https://doi.org/10.1086/268763