Contraining Ideas: How seeing ideas of others harm creativity in open innovation

Open innovation contests that display all submitted ideas to participants are a popular way for firms to generate ideas. In such
contest-based ideation, the authors show that seeing numerous competitive ideas of others harms, rather than stimulates,
creative performance (Study 1). Others’ competitive prior ideas interfere with idea generation, as new ideas need to be differentiated from the preceding ones to be original. Exposure to an increasing number of prior ideas thus heightens individuals’
perceived constraints of expressing ideas and harms creative performance (Studies 2 and 3). Furthermore, creative performance
monotonically reduces with an increasing number of prior ideas (Study 4). A final study demonstrates that showing only a limited
number of ideas as well as grouping prior ideas offer actionable ways to reduce prior ideas’ harmful influence (Study 5). These
results illustrate viable ways to improve contest-based ideation outcomes merely by changing how competitive prior ideas are
presented.