Percentage of answers of the IMI categories, rated from 1 (strongly disagree) to 7 (strongly agree), with an intermediate score of 4 (moderately agree), for the four groups of people with different levels of participation in the project (never participated, participate occasionally, participate regularly, participate a lot).

  Part of: Tiago P, Gouveia MJ, Capinha C, Santos-Reis M, Pereira HM (2017) The influence of motivational factors on the frequency of participation in citizen science activities. Nature Conservation 18: 61-78.