Answer: Habituation
Explanation: Habituation simply refers to a decline in the response rate to a stimulus due to prolonged and repeated exposure to such stimulus. The process of Habituation is usually natural, such that an individual gets used to certain stimulus over time.
In the scenario above, Sarita will usually get distracted when others are chatting when she first moved to her dorm, this is because Sarita is new to the stimulus, However, since the stimulus has become frequent and repetitive, the process of Habituation causes the distraction caused by such stimulus to decrease.