TY - CHAP A1 - Cheng, J. A1 - Teevan, J. A1 - Bernstein, M.S. T1 - Measuring crowdsourcing effort with error-time curves Y1 - 2015 DO - 10.1145/2702123.2702145 T2 - Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems, Seoul, Korea, April 18–23, 2015 CY - Seoul, Korea PB - ACM ER -