Fig. 1

Scores over time. Normalised log-transformed scores over time (measured in days from the beginning of each contest) in all contests (n = 47,921 entries). For visualisation purposes, because some values were zero, we added a small number on the appropriate scale to each score before log-transforming (the number chosen was 10). Note that in all contests low score values are better. Each point on the graph is an entry. The red line follows the progress of the leading entries in the contest, i.e. the entries that achieved the best score at the time of their submission