Disciplinary differences in epistemic beliefs and the moderating role in research approach preferences among postgraduate students in Tanzania

Imagine you are walking into a giant, bustling library where every room is a different world. In one room, people are building bridges with precise blueprints, measuring every inch of steel, and trusting that if the math checks out, the bridge will stand. In another room, people are writing stories, debating the meaning of a single word, and arguing that truth depends on who is telling the tale and where they are standing. This is what happens in university: different subjects, or "disciplines," have their own unique rules for what counts as real knowledge.

But before we dive into the rooms, we need to understand the invisible glasses everyone wears. These are called epistemic beliefs. Think of them as your personal "knowledge goggles." Some people wear goggles that make the world look simple, fixed, and certain—like a puzzle with only one right answer. Others wear goggles that make the world look messy, changing, and full of different perspectives. The big question researchers have always asked is: Do these goggles change how you choose to solve a problem? Do people who think knowledge is simple prefer to use numbers and charts, while those who think knowledge is complex prefer to use interviews and stories? And does the room you are in (your major) change how those goggles work?

This is exactly what a team of researchers from the University of Dar es Salaam in Tanzania wanted to find out. They looked at 479 graduate students—people who are training to become experts and conduct their own research. They wanted to see if the "knowledge goggles" students wore were different depending on whether they studied Business, Engineering, Language, or Environmental Science. More importantly, they wanted to see if the subject you study acts like a filter, changing how your beliefs about knowledge actually influence the research methods you choose.

Here is what they discovered.

The Goggles Change by Room
The researchers found that the "knowledge goggles" students wore were definitely different depending on which academic room they were in. It wasn't just that some students were smarter; it was that their beliefs about knowledge itself were shaped by their field.

For example, students in Business Studies and Statistics tended to wear goggles that made knowledge look very structured, simple, and certain. They scored high on believing that knowledge is organized and that there are clear, authoritative sources for the truth. On the other hand, students in Language Studies wore goggles that made knowledge look much more complex and uncertain. They were more likely to believe that knowledge is messy, depends on context, and is open to interpretation. Environmental Science students also showed a tendency to see knowledge as less certain, likely because they deal with real-world problems that are constantly changing and full of conflicting evidence.

The study used a statistical test called MANOVA to confirm this, and the results were clear: the differences were not just random noise. The biggest difference was found in how students viewed the simplicity of knowledge. Business and Statistics students saw knowledge as highly structured, while Language and Environmental Science students saw it as complex and nuanced.

The Room Changes How You Use the Goggles
The most exciting part of the study is what happened when the researchers looked at how these beliefs influenced the students' choice of research methods. You might think, "If I believe knowledge is simple, I will always choose a simple, number-based method." But the study found that it's not that simple.

The researchers discovered that your academic discipline acts like a moderator. Imagine your epistemic beliefs are a car engine, and your research method is the car you drive. The discipline you are in is the terrain you are driving on. The study found that the same engine (your beliefs) drives the car differently depending on the terrain (your major).

Using a special statistical model called ordinal logistic regression, the researchers showed that the link between what a student believes about knowledge and the research method they prefer changes based on their field. For instance, in some disciplines, believing that knowledge is certain strongly pushes a student toward quantitative methods (like surveys and statistics). But in other disciplines, that same belief might not lead to the same choice, or it might lead to a different kind of method entirely.

The data showed significant "interaction effects," meaning the relationship between beliefs and choices wasn't the same for everyone. It varied by discipline. This suggests that your major doesn't just teach you what to study; it actively shapes how your personal beliefs translate into action.

What This Means for the Future
The study concludes that we can't treat research training as a one-size-fits-all package. If a student in a "hard" science field has complex, flexible beliefs about knowledge, but the field only teaches rigid, number-crunching methods, there is a mismatch. Conversely, a student in the humanities might need help understanding how to structure their complex ideas into a solid research plan.

The researchers suggest that universities should help students become aware of these "knowledge goggles." They recommend that training programs shouldn't just teach the steps of doing research (like how to run a survey or how to interview someone). Instead, they should help students understand why they are choosing those steps based on what they believe about knowledge. By making students aware of how their discipline influences their thinking, teachers can help them become more flexible thinkers who can choose the right tool for the job, rather than just following the rules of their specific room.

In short, the paper shows that while your beliefs about knowledge matter, the subject you study matters just as much in deciding how you use those beliefs. It's a reminder that in the world of research, the map you use depends on both where you think the treasure is and which island you are standing on.