Answer:
Proactive interference
Step-by-step explanation:
Interference refers to a process in which information that is similar gets in the way of information that is being recalled by a person. This explains the process of forgetting in long term memory. Proactive interference occurs when old information prevents the recall of new information. This is the case with Chelsea. The old information that Chelsea already knows (English grammar) gets in the way of her recalling the new information (Spanish grammar).