Research paper: What is an intervention?

The term intervention in the description of the Proposed Intervention Project made me anxious. I consulted two retired social workers. Both were familiar with a family intervention -- a meeting where family and friends are brought in to challenge an individual with a problem (e.g. alcohol or drug abuse) It's clear from reading the description that's not what is meant in the context of this research paper. I emailed the lecturer who sent me the same information from the syllabus.
Reading the description this evening before the class, I realized that the emphasis is on a focus of interest -- and this is a learning project, first of all.