Final answer:
Retrieving information typically results in enhanced memory as it reinforces memory traces, making them more accessible in the future; however, interference can affect the retrieval process.
Step-by-step explanation:
The effect of retrieving information on memory is enhanced memory. The process of retrieval, which includes recall, recognition, and relearning, is essential for keeping memories accessible. Retrieval acts as a sort of rehearsal or re-encoding, which can strengthen the memory trace. Every time information is retrieved, it becomes more integrated into our schema and is easier to recall in the future.
However, some factors like retroactive interference (where new information interferes with the recall of old information) and proactive interference (where old information interferes with the recall of new information) can hinder retrieval and thus affect the strength of memory.