Although morgan had practiced her speech several times, she had trouble remembering the middle part of the speech when she gave it in speech class. this pattern of forgetting illustrates:

I Believe the answer is:  Serial position effect
Serial position effect refers to a tendency among people to held the first and lest object of memory in higher regards compared to the one that placed in the middle. This happen because most people use the first and last objects in the list to mark and separate one set of memory with another.