I am proposing to research the changing narratives behind national anthems. I would like to find out what explains the success of some national anthems at producing national pride across time, compared to similar failures of other anthems in similar circumstances. This research attempts to explain to readers what primary factor of causality drives the changes in interpretations of national anthems over time. 
My research question for a large-n neopositivist study is: “What explains variation in levels of support (defined as the national anthem achieving its goal of instilling a sense of national pride) for national anthems.
I found it most likely that I will need to create my own data set for this research. Inside such a dataset, or in one already constructed, I would operationalize the change in national support of national anthems by creating a unique plus/minus ordinal grading scale. There is some variance of measurement in national surveys across world polls on national pride, so a unique grading scale would be necessary for this project. After recording the time and event of a dependant variable occurring, survey data from before and after the dependant variable will be measured.
A set of selected cases to a set of comprehensive independent variables would be selected from various national or international survey services. An existing dataset that I will use as a measurement tool recording the change in opinion of the US national anthem is a combination of the 1991 Gallup May 4 Poll and 2001 Terrorism Reaction Poll #3. As mentioned earlier, I will compile these polls into a single ordinal grading scale. The questions in each poll was: “Which of the following would you PREFER as the national Anthem? The Star Spangled Banner, My Country ‘Tis of Thee, America the Beautiful, or God Bless America?” Only the difference of % of respondents who chose The Star Spangled Banner will be measured. In this data set, only one case for my research (the United States’ perception of their national anthem) was measured, so similar datasets for other cases are necessary for a large-n analysis. 
At the moment, two of the primary independent variables I am investigating are the effects of institutions and inherent human psychology on how perception of national anthems change over time. A possible limitation of the datasets is the nonuniformity of such national survey polls. This will force me into creating a custom ordinal grading scale, possibly creating problems in terms of ignored variables within the cases.
 Wayne C. Booth, Gregory G. Colomb, Joseph M. Williams, Joseph Bizup, and William T. Fitzgerald, The Craft of Research (4th ed.), Chicago: University of Chicago Press, 2016, 54.
 Gallup Poll News Service. May Wave, #4. Gallup Survey Distribution. (05/23/1991-05/26/1991). Retrieved from: https://institution-gallup-com.proxyau.wrlc.org/documents/questionnaire.aspx?STUDY=GNS122035; Also Gallup Poll News Service. Terrorism Reaction Poll, #3. CNN/USA Today. (09/21/2001-09/22/2001). Retrieved from: https://institution-gallup-com.proxyau.wrlc.org/documents/questionnaire.aspx?STUDY=P0109036