Table 1.

Median Cohen κ values for pairwise readers. For study 2, pairs of readers were considered only if both readers saw at least 62 of the same images.

Feature	Study 1 (experts), median κ	Study 2 (nonexpert crowd), median κ	Study 3 (expert crowd), median κ
Dots	0.2977	0.5264	0.4829
Globules	0.4075	0.3945	0.5166
Lines	0.5205	0.3983	0.4433
Network structures	0.6175	0.5810	0.7575
Regression structures	0.4643	0.5066	0.4730
Vessels	0.7683	0.7977	0.7903