Introduction to the Book
Principles of Intervention Development
Causality, Systems and Complexity
6SQuID Step 1: Understand the Problem and Its Causes
Step 2: Identifying Modifiable Causal Factors
Step 3: Identifying How to Bring About Change: Theory of Change
Step 4: Identifying How to Deliver Change Mechanisms - Theory of Action
Step 5 of 6squid: Testing and Adapting the Intervention
6SQuID Step 6: Collecting Sufficient Evidence of Effectiveness to Proceed to a Rigorous Evaluation
Case Studies
Conclusion