Consider someone who still cares deeply about her work. She enjoys solving difficult problems and wants her team to succeed. By most everyday descriptions, she is engaged.
She has also stopped raising concerns with her manager. The last few times she did, nothing changed. When a promotion went to someone who did not meet the published criteria, she stopped treating those criteria as a reliable guide. She still delivers, but she is more careful about where she puts her effort.
Her commitment to the work and her confidence in the organization are moving in different directions.
That distinction matters. Leaders can see people working hard and assume the relationship is healthy. They can see a respectable engagement score and reach the same conclusion. Meanwhile, people are revising what they expect from the organization and what they are willing to contribute to it.
This is why we believe trust deserves to be measured and managed in its own right.