Final answer:
The shift is from descriptive descriptors to standardized measures of motor performance in development.
Step-by-step explanation:
The shift in this question is referring to the change in the way motor performance is assessed and described in development. In the past, there was a focus on descriptive, qualitative descriptors of development. However, over time, there has been a shift towards standardized measures and scores of motor performance. These standardized measures provide more objective and quantifiable data about a child's motor skills, such as the average distance a child of a certain age can broad jump. This allows for easier comparison and tracking of motor development across individuals and age groups.