Everyone is different and unique, thus everyone does not learn in the same way. Here is the question: Which is better, group studying or studying alone?
Studying alone allows you to set the perfect study environment so you get the most out of studying. It also allows you to use the most effective (有效的) learning methods. Some students learn best with flashcards while others learn best when they reread texts. Find your learning methods, and make your studying be the best results.
When you study alone, you're able to pay attention to exactly what you need to learn. It's easy to look over the things with which you're already comfortable and familiar.
When you set a date and time to get together with a study group, it stops you from procrastinating (拖延) because you know other people are counting on you to be there.
When you study in a group, you can remember more information. This is because you take your notes and put the information into your own words rather than reading from a textbook. Moreover, it's very similar to teaching the others in your group, which leads to remembering the information better.
Being with other people allows you to get different ideas about the things. Sometimes someone can say just one sentence or word and it will all make sense.