Evaluating Children's Services: Recent Conceptual and Methodological Developments

This article considers recent innovations and challenges withrespect to the evaluation of children’s services interventions.It sets out a method for designing and evaluating services thatis based on research evidence gathered on individual cases andthat permits revision of those services in the light of emergingresults. It starts by describing briefly different ways of identifyinga discrete group of children with similar needs. It then outlinesapproaches to ensuring that an intervention for those childrenis underpinned by theory and research evidence–includingthe idea of ‘logic modelling’–before discussingthe importance of capturing accurately how well the interventionis implemented. Experimental and non-experimental methods ofassessing an intervention’s effectiveness are considered,with particular emphasis on techniques for enhancing the causalinference that can be drawn from studies and the importanceof matching method and purpose. The article also demonstrateshow the principles and methods used in relation to evaluatingservices for groups can be applied in clinical work with individualcases, and identifies the benefits of this general approachto evaluation over and above the information that it provideson what works.