Background: Corpora and Evaluation Methods - Methods for Mining and Summarizing Text Conversations - page 30

Figure 2.1: The Cartesian quadrant in which an ROC curve is plotted. The first point with threshold
p=1 is the origin. The last point with threshold p=0 is the upper right corner.

1

0.8

0.6

0.4

0.2

random performance

0

0 0.2 0.4 0.6 0.8 1

FP rate

Figure 2.2: ROC curve indicating random performance.