Researchers have shown that the working, or short-term memory, has a limited size of seven items, plus or minus two. This means that there is a maximum number of new things you can remember at any one time. However, one way to more effectively recall more new information is by linking the new material to concepts that you already know. Barker and McDonnell believe that the jargon-heavy textbooks force the brain to focus on retaining complicated vocabulary, instead of concentrating on the new concepts. Furthermore, since both the term and concept behind the material are new, students have a more difficult time finding a link to previous knowledge. By removing jargon from the study material, students can more easily learn the concept, pick up the jargon later on, and be more successful in making connections in their mind.