Discussion
In signal detection a liberal criterion will produce points :
Answer: C
A liberal criterion produces points above the no bias line.
On an ROC graph, hit rate is plotted against false-alarm rate. The 'no bias' line is the minor diagonal, along which the observer is neither inclined to say 'yes' nor 'no'. A liberal observer says 'yes' readily, which raises both hits and false alarms and moves the point towards the upper right of the graph, above that line. A conservative observer's points fall below it, towards the lower left.
Points near the line indicate an unbiased criterion, and points below or far below it indicate a conservative one.
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