Problems in the study of behavior, there are diverse groups of students to do research.And most of the samples will not function, phat, because the fear is too long.
The problem in studying the eating habits of a group of students with various research groups were often not easy to interview Brown because of concerns that it would take too long.
The problems in the study of eating behavior of students with a variety of to do the and samples, most will feel uncomfortable interview because that will use the time too long.