Fig. 2: High spatiotemporal, self-administered smartphone surveys (S4) have previously been trialled in six countries between 2015 and 2023 with almost 900 total participants.
From: Realities of using self-administered smartphone surveys to solve sustainability challenges
A The location of these six countries. An adapted ODK interface provides: B a notification reminding participants that there is a task available; C an indication of the points available, the subjects, and the length of the task; and D the task itself with the ODK-designed survey, including photo, free text, and multiple-choice options among others.
