The phrase "role changes" refers to a situation where someone's responsibilities or position in a group or organization is modified or switched with another person. Full definition
Family roles change as members age, but adolescents still need to interact with their families. (articles.chicagotribune.com)
The teacher's role changes from a very active one to a facilitating role. (marzanocenter.com)
The authors describe how leadership roles changed over the span of two years, and how new structures to build capacity and to distribute decision making have emerged since the inception of the project. (cacollaborative.org)