Alt. versions

Three different types of versions of ParEvo have been conceived, and some of them actually implemented

  1. Face to Face ParEvo – suitable to classrooms and workshops. Described in detail on this webpage
  2. Scaled Up ParEvo – enabling a much larger group of people to be involved
  3. Gamified ParEvo – providing participants with feedback on their relative performance

Scaled Up ParEvo

  1. .Audiences: The basic online version of ParEvo does not involve any kind of audience. There is just a a Facilitator and the invited participants. But in 2021 Eva Otero used ParEvo to evaluate a UN volunteer sending programme. 12 participants described the (imagined) experiences of new volunteers, over eight iterations. The completed storylines were then shared with a large audience of actual UN volunteers, who were asked a number of questions via an online survey, including how realistic the different storylines were, in the light of their own experiences.
    • Another possibility is that audiences reactions can be solicited after each iteration, not just at the end of each exercise.
  2. Commentators: These are people invited to comment on the contributions made in each iteration, before progress onto the next iteration. They are usually small in number and have some relevant subject knowledge.
    1. Commentators can also channel/filter responses by a wide population of people i.e. the audience
  3. Teams as participants: Individual participants each represent the views of different teams of people. Members of each team interact with each other during each iteration (after reading the most recent contributions by other teams and when planning their own new contribution). There is evidence that this kind of modularity can improve “collective intelligence” types performance. See Navajas, J., Niella, T., Garbulsky, G., Bahrami, B., & Sigman, M. (2018). Aggregated knowledge from a small number of debates outperforms the wisdom of large crowds. Nature Human Behaviour, 2(2), 126–132
  4. First Come First Served: In this version the number of approved participants will be much larger than the number allowed to actually contribute in each iteration. Contributions will be accepted on a first come first accepted basis, until the maximum allowable number of contributions is received, in any given iteration
  5. Double Darwinian: In the basic version of ParEvo participants are only allowed to extend storylines that were added to in the previous iteration, not those that were ignored. In this version there is an additional rule. Participants whose contributions were not built on by others in the previous iteration drop out of the pool of active participants, and are placed at the bottom of a waiting list. They are replaced by another at the top of a waiting list.


  1. Leader board: Participants are given scores which represent the total number of all contributions others have added to their contributions, and these scores are made visible to all participants. The scoring system excludes contributions which built on one’s own previous contributions. This option is now available, and can be switched on/off by the facilitator at any stage of a ParEvo exercise.