Reference - https://www.sciencedirect.com/science/article/abs/pii/0001691889900073?via%3Dihub
Why
The core of expert performance is an organised set of response strategies than can be employed flexibly to meet task demands.
Subjects trained under rotating emphasis manipulation performed significantly better than control players, and experienced a continued advantage increase after experiment termination.
What
The schema model of executive function observes the formation of schemas, individual and indivisible units of control that can be composed together (many, and often multiple at the same time together) in order to meet the demands of a complex task.
When performing a complicated task, human subjects often have little knowledge of, and do not spontaneously explore, alternative strategies. When led to do so, performance improves.
Performance under high-attention load conditions benefits most when subjects are trained on several, varying levels of subelement priorities.
How
Divide skills into core components, train individually, together and then experiments with their composition. This is aptly called Part-Whole training.
However, instead of training individual schemas in isolation of each other and in absence of the entire goal, only attempt to manipulate and assign the relative emphasis (priority) of selected subcomponents in a rotating manner.