I've just found this thread and skimmed it.

In the UK with the new emphasis on 'Prevent' in our national CT / security strategy up has popped a need for metrics. In particular for counter-radicalisation and preventing violent extremism.

I am sure law enforcement, maybe intelligence, can think of "bean counts", but as this work involves partners who have never been directly involved, examples local hospitals and schools - it is not easy.

The only metric I've found in a literature search has been opinion polling of the extent of support for the ideas that support extremism. Hardly easy to "sell" to government, especially as polling can provide suprises.

Just a few thought from a comfortable armchair.

davidbfpo