You have mixed some concepts.
As Stanislav has written; there are two approaches.
Predictive and Adaptive
Within Adaptive you may find both incremental and iterative which are distinct from each other.
However, it is highly likely that Incremental is also found within Predictive models.
How Does That Work?
Increments are pre-defined packages of ...
I have written about the scientific evidence on teamwork for 20 years. I like your thinking. There are pretty solid answers in the research literature:
Yes. Anything you can do to give the team more control over its work is likely to improve measurable team performance and worker satisfaction.
Shorter objectives are more motivating, but longer goals can be ...