Explain what the acronym hsi represents. what is its purpose? what are two of the areas of specialization for hsi researchers and practitioners?

Human Systems Intervention (HSI) is the design and implementation of interventions in social settings where adults are confronted with the need to change their perspectives, attitudes, and actions. Depending on the philosophical and theoretical orientation of the intervener, the process can be approached as a planned, systematic, and collaborative activity.

The field of HSI is based on social science research that seeks to understand social change and to improve the effectiveness of interning in a diverse range of social systems. Researchers and practitioners who work in this area view human collectives (small groups, teams, community groups, public and private sector organizations, etc.) as systems that behave in ways generally consistent with general, open, or complex adaptive systems theory[1][2] They see social change as a process of adaptation and learning that can be studied and supported at individual, group, and larger social system (organizational or network) levels. The field views human systems as dynamic and changing, and as existing within a wider social context with which it has a mutually influential relationship. Some practitioners design and deliver OD Interventions that rely on action research and action learning approaches

How do we if it is a video and they know your face.

The answer would be true.