Some people like doing something in groups for better result, but for me doing something in groups is rather difficult for me. Maybe because I don't trust some people in the groups can do the task well, so sometimes few people must do double job to revise the mistakes from other friends, and it will take a long discussion and debates, and this really bother me . Usually in groups I also get double job (I insist to do that) from the beginning, so the task will finish soon. It doesn't mean that I'm much better than others, but I have to be honest sometimes some members are not serious enough to do the task, and it will make me mad, so better I do it from the beginning.
But I also realize that not every task can be done alone, in some cases I can't do it without groups, but in that cases too I will choose the person who can really serious to study or work.
There are times that studying alone helps you to concentrate more and focus on what you are doing and finish your task on time. However, there are instances that questions or tasks we encounter need to be solved with the help of your friends/classmates. Working or studying in group promotes better discussion and sharing of ideas to come up with a better result. This type of work is recommended if the participants are fully aware of their responsibilities, like cooperation and objectivity.
In my case, I do self study most of the times and whenever I feel that I need help from others, so I invite them for give me a hand.