Table 2. Comparison of average participation metrics in five online CS projects and platforms.
| Activity Ratio | Relative Activity Duration | Variation in Periodicity (days) | |
|---|---|---|---|
| Adult volunteers | |||
| Galaxy Zoo [18] | 0.33±0.38 | 0.23±0.29 | 25.23±49.16 |
| Milky Way [18] | 0.40±0.40 | 0.20±0.30 | 18.27±43.31 |
| nQuire-it [10] | 0.32±0.35 | 0.43±0.44 | 5.11±5.36 |
| Young volunteers | |||
| Zooniverse (all projects) [12] | 0.31±0.44 | 0.49±0.36 | 49.93±52.08 |
| iNaturalist | 0.53±0.45 | 0.26±0.38 | 79.68±128 |
The results of three participation metrics across five different online citizen science projects and platforms, three researching adult participation behaviour and two researching young volunteer behaviour. Metrics values are means ± SD.