nd completed a protocol analysis yielding four task-based scenarios and
one exploratory scenario. These standard web usability methods (Haklay and Tobo´ n 2003,
Nivala et al. 2008) did not include a GIS ‘chauffeur’ (Nunamaker et al. 1991) because such
experts are not realistically available to citizen scientists. We observed the time to complete
each task from a separate video room, documented problems, and recorded whether participants
successfully completed each task. We asked participants to talk aloud and stopped
them after 4 minutes or when they became frustrated. We videotaped each participant and
kept observation logs. Participants completed a post-protocol survey including 30 questions
on a 1 (Strongly Agree) to 7 (Strongly Disagree)