When Counting is Not Enough: Limitations of NSA's Effectiveness Assessment of Surveillance Technology. - Michelle Cayford; Coen van Gulijk; Pieter H. A. J. M. van Gelder (JISIC, 2014)

Measures of Success: Developing a Method for Evaluating the Effectiveness of Surveillance Technology. - Michelle Cayford (EISIC, 2015)

The effectiveness of surveillance technology: What intelligence officials are saying. - Michelle Cayford; Wolter Pieters (Inf. Soc., 2018)

Wanting it all - public perceptions of the effectiveness, cost, and privacy of surveillance technology. - Michelle Cayford; Wolter Pieters; Pieter H. A. J. M. van Gelder (J. Inf. Commun. Ethics Soc., 2020)