Evaluation of time delays in firework fuses: user expectations of product feedback and performance

摘要

Injuries can occur with fireworks if they explode befroe users ae a safe distance away,or when users approach a firework that they incorrectly assume is a dud.In this study,we investigated the amount of elapsed time before users start to approach an unexploded firework.We had 30 test participlants light four fireworks.After lighting each one,the participants indicated: 1) when they thought the firework would explode,and 2) when they first thought the firework was a dud.Participants were asked to walk toward the firework whn they assumed it was a dud and pick it up.