Are secondary sources acceptable in a dissertation literature review?

Yes, you absolutely need to move beyond secondary sources for your dissertation work. While it’s tempting to rely on review articles or summaries to save time, your committee is pushing back because they view your dissertation as an original contribution to the field, not just a report on what others have already said. Think of it like being a detective: if you only read the newspaper’s summary of a crime, you’ll miss the crucial details and inconsistencies that only come from looking at the original police reports and evidence logs. By relying on secondary sources, you’re essentially letting someone else decide which parts of the research are important, which keeps your own analysis at a surface level. I know how frustrating it is to feel like you’re drowning in reading, especially when you’re just trying to build a solid theoretical foundation for your slides. It feels like a massive hurdle to track down every primary study, but doing so is what shifts your work from an undergraduate summary to a doctoral-level synthesis. When you engage directly with the primary empirical studies, you’ll find the gaps, the limitations, and the nuanced arguments that allow you to frame your own research with authority. Take a deep breath and start swapping out those summary papers for the original studies; once you see how the primary research actually connects, you’ll find it much easier to defend your framework to your chair. You have the skills to master this material, so just take it one primary source at a time and you will get your committee back on your side.