Psychological traits of scientists predict their theories and research methods

The way psychological scientists think on a personal level is tied to the theoretical camps they join and the research tools they prefer. These personal intellectual habits help explain why deep disagreements persist in science even when researchers look at identical data. The research was published in the journal Nature Human Behaviour.

The traditional view of science assumes that accumulating data eventually settles academic debates. According to this perspective, disagreements between researchers are usually driven by differences in what they know. When evidence mounts against an outdated idea, the scientific community theoretically discards it for a more accurate model.

However, deep divisions still exist in fields like psychology. Researchers routinely argue over whether to focus on biological mechanisms or social settings when explaining human actions. Because access to the same methods and data does not always guarantee agreement, some academics suspect that these separate camps endure for reasons unrelated to raw facts.

A research team wanted to see if these persistent academic splits might actually reflect underlying mental habits. They designed a study to test whether a scientist’s personal ways of thinking steer them toward specific theories or research tools. They evaluated how these private traits relate to a laboratory environment.

Justin Sulik, a researcher at LMU Munich, led the investigation. Sulik worked with Nakwon Rim and James Evans of the University of Chicago, Elizabeth Pontikes of the University of California, Davis, and Gary Lupyan of the University of Wisconsin-Madison.

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The team surveyed nearly 8,000 scientists working in psychology and related fields. They asked the participants to explain their stances on 16 debated topics. These topics included whether human behavior is best explained by rules of rational self-interest, whether brain biology is essential for understanding the mind, and whether cognition relies heavily on social environments.

The survey then measured several established cognitive traits among the participants. One trait was tolerance of ambiguity, which refers to how comfortable a person is with uncertainty and poorly structured problems. Another was the need for cognitive structure, which measures a preference for logical planning and predictable routines.

The survey also tested for differences in visual and verbal thinking styles. The researchers separated visual imagination into two categories. Spatial imagery involves the ability to mentally rotate three-dimensional geometric figures, while object imagery involves picturing highly vivid, detailed scenes.

The results showed that researchers’ basic mental dispositions are associated with their positions on broad scientific debates. Scientists who scored high in tolerance for ambiguity tended to reject the idea that humans always act with rational self-interest. They also favored holistic explanations of behavior that highly prize a subject’s cultural context.

Conversely, scientists with a high need for cognitive structure leaned in a different direction. They were more likely to believe that theoretical concepts like working memory correspond to real, physical things in the human brain. They also preferred rule-based, logical explanations for human behavior.

The physical tools scientists use in the lab were also linked to their abstract beliefs. People who used brain imaging techniques were less likely to believe that social environments are important for explaining human action. Researchers who reported strong spatial imagination skills were more likely to use mathematical modeling in their daily work.

The scientists pointed out that these methodological correlations are highly revealing. It might simply be practically difficult to study a large interacting social group while using a brain scanner. However, the users of those machines also held broad philosophical beliefs that social contexts simply do not matter much for understanding cognition.

To map out these worldviews, the researchers grouped the controversial themes into five underlying belief systems. These latent mathematical factors were labeled as essential, biological, logical, contextual, and objective. A scientist scoring high on the essential factor generally believes that human capacities are mostly innate and that personality remains stable over a lifetime.

Tolerance of ambiguity was a psychological trait associated with all five of these scientific belief systems. People who were highly tolerant of ambiguity were less likely to view the human brain as a computer. They were also less likely to prioritize evolutionary explanations for behavior, favoring contextual social explanations instead.

The research team also wanted to see if survey responses translated to actual scientific output. They received permission from a portion of the participants to securely link their survey answers with their professional publication records.

The team utilized machine learning technology to analyze the text of the scientists’ published abstracts and article titles. The computer algorithms measured how closely the words and phrasing matched among different authors. They also built algorithms to map out who these scientists collaborated with and which older papers they cited as foundational literature.

The algorithms revealed that cognitive traits are associated with differences in real-world publishing activity. This remained true even when controlling for a researcher’s specific subfield and preferred tools. Two psychologists who study the exact same topic using identical methods are still more likely to cite the same reference materials if they happen to share similar internal thinking styles.

The authors note that these patterns reveal the difficulty of translating ideas between differing scientific camps. The problem is not just about abstract logic, but is deeply tied to individual human cognition. Researchers simply have different internal thresholds for what kind of explanation feels satisfying and closest to the truth.

There are a few cautions to keep in mind when interpreting the results. The mathematical effect sizes in the study were relatively small. This means that while the mathematical trends are consistent across thousands of people, a single scientist’s cognitive traits will not dictate every research choice they make.

The survey also had a low response rate of three percent, which is standard for mass email surveys but means the participants skewed toward scientists who publish frequently. Additionally, the researchers only examined psychologists. They hope to expand this framework to other scientific disciplines to see if similar patterns emerge in fields like physics or sociology.

Ultimately, the researchers suggest that science might benefit from actively managing diverse cognitive styles in research groups. A broad mix of natural problem-solving approaches could help bridge deep theoretical divides that data alone has failed to resolve. In the paper, the authors conclude that “science is a human enterprise, and understanding the development of scientific knowledge depends on an account of the thought processes of humans.”

The study, “Differences in psychologists’ cognitive traits are associated with scientific divides,” was authored by Justin Sulik, Nakwon Rim, Elizabeth Pontikes, James Evans, and Gary Lupyan.