What are the method of loci and the pegword systems? What are the three factors that the text suggests may contribute to their effectiveness? According to the text, four factors play a key role in...

What are the method of loci and the pegword systems? What are the three factors that the text suggests may contribute to their effectiveness?

According to the text, four factors play a key role in determining the effectiveness of studying. What are they? What evidence points to their importance?