Validation of Smets' hypothesis in the crowdsourcing environment

In the late 1990s, Philippe Smets hypothesizes that the more imprecise humans are, the more certain they are. The modeling of human responses by belief functions has been little discussed. In this context, it is essential to validate the hypothesis of Ph. Smets. This paper focuses on the experimental validation of this hypothesis in the context of crowdsourcing. Crowdsourcing is the outsourcing of tasks to users of dedicated platforms. Two crowdsourcing campaigns have been carried out. For the first one, the user could be imprecise in his answer, for the second one he had to be precise. For both experiments, the user had to indicate his certainty in his answer. The results show that by being imprecise, users are more certain of their answers.