The document discusses various inter-group intervention techniques including team building, survey feedback, and grid organizational development (OD). It describes team building as activities to enhance team effectiveness, including considering team composition and processes. Survey feedback relies on surveys to identify problems and design corrective actions. The grid OD model identifies five leadership styles based on concern for people and production, ranging from impoverished to team management. Team management with high concern for both people and tasks is viewed as the most effective style.