Designing and Evaluating Interventions to Reduce Crime and Reoffending Summary

A summary version of guidance on how to use the 5 Step Approach to designing and evaluating criminal justice interventions.


Authored by Catherine Bisset

Background: The tricky business of measuring impact in a messy world

A Scottish Approach to Evaluation

Our approach to evaluation enables funders and service providers to work together in pursuit of their shared aims – to improve outcomes for service users and communities. The 5 step approach also engages with service users’ views as a resource for evaluation rather than seeing users solely as an object to be measured. In fact, most complex social outcomes can ONLY be achieved if we make a distinctive, yet joined-up contribution over a sustained period of time.

The 5 step approach focuses on ways in which evaluation is possible for services of any size, rather than expecting all services to use an experimental evaluation method which may not be appropriate or possible for smaller, community-based organisations. The 5 step approach allows even the smallest service to demonstrate the contribution they are making to change.

An Improvement Culture
Evaluation enables improvement and even the most successful service can always be developed further. Furthermore, with the 5 step approach, evaluation is an on-going process, not something to be saved for last. This means that services can be continually improved in order to best meet the needs of their users.

How do you know if you are making a real difference to users (making an impact)?

It’s not easy to find out if you’re making a real difference to people, especially in the chaotic real world. There are hundreds of variables which can effect people’s attitudes, motivations and behaviour. So how can you tell if your project is making any difference?

Researchers and scientists generally agree that best way to determine if your project or service has made a difference is to use a randomised control trial (RCT), sometimes referred to as an 'impact evaluation' but these are not easy to do in practice, especially in a complex social setting.


Email: Catherine Bisset

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