Final answer:
This situation exemplifies the psychological concept of projection, where Lillian attributes her own desire for a new doll to her grandmother.
Step-by-step explanation:
This situation exemplifies the psychological concept of projection. Projection is when someone attributes their own thoughts, feelings, or desires to someone else, assuming that the other person must have the same thoughts or desires. In this case, Lillian is projecting her own desire for a new doll onto her grandmother, assuming that her grandmother wants the same thing.