In the current study, we use a prospective, parent - offspring adoption design that allows for the differentiation between genetic and environmental contributions of parent anxiety to infant negative affect. (frontiersin.org)
This model allows for differentiation by varying the amount of time spent on the material, the prompts the tutor provides, and the level of difficulty of the material used. (ascd.org)
Requires knowledge of various maths topics, and bonus questions allow for some differentiation. (tes.com)