In the last tutorial, we saw how CINAHL suggests standard headings for our search terms. In this tutorial, we will continue to perform that search using the CINAHL headings suggested by the system. So this is where we left off last time. I'm going to click on 'Accidental Falls', and you can see I'm taken to the 'Tree View' of the CINAHL heading 'Accidental Falls'. of the CINAHL heading 'Accidental Falls'. This view shows the position of the heading 'Accidental Falls', in hierarchical structure of all CINAHL headings. You can see it is under 'Accidents'. On the right-hand side, is the check box 'Major Concept'. CINAHL articles are typically assigned multiple headings. However, indexers are required to identify among these headings major ones for each article. These major headings reflect the primary topics of the article. So checking this box here will allow us to focus our search to only those articles that have 'Accidental Falls' as a major topic, and will filter out the articles that only have the concept as a minor topic. However, just to be on the safe side, I suggest that you always begin with a broader search, without checking this box. If you get too many results, you can always do the search again, and use this check box to narrow the search to more relevant results. So I'm going to leave this box unchecked at this time... Anything with a plus sign in the tree view means that it is collapsible, and there are more headings listed under it. Our term, 'Accidental Falls', doesn't have a plus sign, but if I click on this one, 'Occupational Accidents', you can see that the concept 'Surgical Fires' is listed under it. Now if I select a term that has more headings listed under it, on the right-hand side, I will have the option to 'Explode' the heading. This is important, because of what's known as the 'Rule of Specific Entry', an indexing practice which means, an article is assigned "headings at, and only at, the most specific level possible." For example, an article on 'Occupational Accidents' will be assigned the CINAHL heading 'Occupational Accidents', and not its more general term 'Accidents' at the same time. Similarly, articles that are assigned the more specific terms under 'Occupational Accidents' such as 'Surgical Fires', are not assigned the more general term 'Occupational Accidents' at the same time. Therefore, if we select only 'Occupational Accidents', we will miss all those articles that are assigned terms at more specific levels. And that's when the 'Explode' feature comes in. What this does, is to automatically include everything that is indexed at more specific levels. For example, exploding the heading 'Occupational Accidents', will automatically include articles that are assigned more specific terms listed under it, such as 'Surgical Fires'. Now, this doesn't really apply in our example here, because our term, 'Accidental Falls', does not have any more specific terms listed under it. But in your searches, if your term does have more specific terms listed under it, it is a good idea to keep the 'Explode' box checked. That way, you can be sure that everything that falls into the scope of the concept is included in the search. If I select a CINAHL heading here, a new column will pop up, and these are the subheadings of this particular heading. Most CINAHL headings have subdivisions called 'subheadings'. Sub-headings help further refine your search, by narrowing it to specific facets, or aspects, of a CINAHL heading. In this example here, I'm not going to make any choice, and by default, all subheadings are going to be included in my search. Now here, I can see some notes about the 'Accidental Falls' heading itself— some related headings, and some commonly used synonyms. Okay, so we've made our choices— now, how do we actually do the search? Well, I'll have to make sure that our term is selected in here, and click on the 'Search Database' button. By now, we have finished the search for our first concept 'Accidental Falls'. You can see that our search is, indeed, posted in the search history table. In the next tutorial, we will complete our search for the other concepts in our question, and I am going to be showing you how to combine and limit those searches in various ways to further fine-tune the search result set to the most relevant articles. I'll see you next time.