Charity is having trouble remembering the layout of her new dorm room this year because the location of appliances is on the opposite side of the room compared to last year's room. Almost by habit, she walks to the wrong side of the room to use them. What is Charity experiencing?

Proactive interference.

Explanation:

Proactive Interference: In psychology, the term "proactive interference" is described as a phenomenon that occurs when an individual tends to memorize a specific list of information including formulas, words, ideas, names, or anything else that falls under a list format, and when he or she tries to remember the later part of that particular list then he or she forgets the earlier part of the list that he or she has memorized troubles or gets in the way.

In the question above, Charity is experiencing proactive interference.