Four spaced volumes allow a researcher to cross a decade without forcing every annual into a short piece. The method is quantitative because the researcher decides how many time points to use, and qualitative because matching chapters must be chosen through judgment. Consistent intervals make comparisons defensible, while comparable subjects reveal how naval concerns and language change over time. Used carefully, the combination charts change while keeping the evidence manageable.
Notable Point · 35:10-36:08
Combining quantitative and qualitative sampling
The closing lesson separates the quantitative choice of sample years from the qualitative choice of comparable chapters.