Brain Surgeon vs Rocket Scientist: University Study Reveals Who Edges Out in Key Intelligence Tests

Unpacking the Stereotypes: Intelligence in Elite Professions

The longstanding debate over whether brain surgeons or rocket scientists possess superior intelligence has captivated public imagination for decades. Phrases like 'It's not brain surgery' and 'It's not rocket science' imply these professions demand exceptional cognitive prowess. However, a groundbreaking study led by researchers from top universities challenges these assumptions, revealing nuanced insights into the cognitive profiles of neurosurgeons and aerospace engineers. 99 96

In higher education contexts, this research holds particular relevance. Universities worldwide train the next generation of professionals in medicine and engineering, often through rigorous programs that hone specific cognitive skills. Understanding these differences can inform curriculum design, admissions processes, and career counseling at colleges and universities globally.

The Imperial College-Led Study: Settling the Score

Published in the prestigious British Medical Journal's Christmas issue in 2021, the study titled "It’s not rocket science and it’s not brain surgery—assessing the cognitive abilities of neurosurgeons and aerospace engineers" originated from collaborations at Imperial College London, University College London (UCL), King's College London, and the University of Bristol. 99 Led by neurosurgical trainees and professors in brain sciences, the research recruited 329 aerospace engineers and 72 neurosurgeons from the UK, Europe, US, and Canada via professional societies like the Society of British Neurological Surgeons and the UK Space Agency.

Participants completed the Great British Intelligence Test (GBIT), an online battery developed at Imperial College London, comprising 12 tasks measuring planning, reasoning, working memory, attention, and emotion processing. Scores were standardized against over 18,000 general population participants, with confounders like age, gender, and handedness regressed out. 97

Methodology Breakdown: Rigorous Cognitive Assessment

The GBIT tasks included digit span for working memory, Tower of London for spatial planning, verbal analogies and rare word definitions for semantic problem solving, and mental rotation exercises for spatial manipulation. Factor analysis reduced raw scores into six domains: memory, spatial problem solving, semantic problem solving, mental manipulation and attention, problem solving speed, and memory recall speed.

Data cleaning ensured validity—excluding incomplete or inattentive responses—resulting in high-quality datasets analyzed via generalized linear modeling in MATLAB. This university-backed approach exemplifies how higher education institutions leverage advanced analytics to probe human cognition. 99

Key Results: Specialized Strengths, No Overall Superiority

Neither profession outperformed the general population significantly across all domains, debunking the myth of innate genius. However, distinct edges emerged:

• Neurosurgeons excelled in semantic problem solving (difference 0.33 z-score vs. engineers, 95% CI 0.13-0.52, p=0.001), involving verbal fluency and rare word definitions—crucial for communicating complex medical concepts.
• Aerospace engineers shone in mental manipulation and attention (difference -0.29, 95% CI -0.48 to -0.09, p=0.004), vital for 3D modeling and monitoring flight systems.
• Neurosurgeons demonstrated faster problem solving speed (z=0.24 vs. population, p=0.008) but slower memory recall (z=-0.19, p=0.01).

No differences in memory, spatial problem solving, or other speeds between groups. 99 96

Defining Cognitive Domains: Step-by-Step Insights

Semantic problem solving (full form: semantic processing and verbal reasoning) assesses vocabulary depth and analogy-solving, key for neurosurgeons interpreting patient histories or research papers. Step 1: Present rare words; Step 2: Define based on roots/context; Step 3: Score accuracy/speed.

Mental manipulation and attention (mental rotation and sustained focus) involves visualizing object rotations in 3D—essential for engineers designing aircraft. Process: 1. View 2D image; 2. Rotate mentally; 3. Match to options; 4. Maintain vigilance against distractors.

These domains highlight how university curricula tailor training: medical schools emphasize verbal precision, engineering programs spatial computation. 97

University Affiliations and Academic Rigor

The study's credibility stems from elite institutions: Imperial College London's Department of Brain Sciences provided the GBIT platform, UCL's Cancer Institute and Great Ormond Street Institute contributed neurosurgical expertise, and King's College handled neuroimaging analytics. This inter-university collaboration underscores higher education's role in myth-busting research.

Lead author Aswin Chari, a neurosurgical registrar at Great Ormond Street Hospital and UCL affiliate, noted: "Everyone has a range of skills... it is very difficult to be better in everything." Such work influences global academic discourse. 99

Training Pathways in Global Universities

Neurosurgery training spans 14-16 years post-high school: 4-year bachelor's (pre-med focus), 4-year medical school (e.g., Harvard Medical School, Oxford University), 7-year residency (e.g., Johns Hopkins Neurosurgery). Curricula demand semantic skills via case studies and ethics seminars.

Aerospace engineering: 4-year bachelor's (e.g., MIT, Caltech, University of Toronto), optional master's/PhD. Programs stress spatial skills through CAD software, wind tunnel labs, and propulsion simulations.

Globally, top med schools like Karolinska Institute (Sweden) and engineering powerhouses like ETH Zurich integrate cognitive training, preparing students for specialized demands. 76 86

Admissions Insights: Cognitive Proxies in Higher Ed

University admissions use SAT/ACT (undergrad) and GRE/MCAT (grad) as IQ proxies. Medical schools average MCAT 511-512 (top 10%), engineering GRE Quant 165+ (90th percentile). Harvard med admits correlate to IQ ~130+, similar to Stanford engineering.

Yet, holistic reviews at universities like University of Toronto prioritize non-cognitive traits, aligning with study findings that raw IQ isn't destiny. 66

Broader Academic Perspectives on Professional Intelligence

Beyond this study, university research estimates surgeons' average IQ at 120-130, engineers similar. A 2022 analysis of occupational IQs found physicians ~125, physicists/astronomers ~130—no vast gaps. Higher ed emphasizes grit over genius, per Angela Duckworth's UPenn work.

Career Implications for University Graduates

Aspiring students: Match strengths—verbal for med (e.g., neurosurgery residencies at Barrow Neurological Institute), spatial for aero (e.g., Georgia Tech capstone designs). Interdisciplinary programs at Purdue University blend both, fostering versatile thinkers.

• Benefits of med path: Patient impact, high salaries (~$800K USD globally).
• Engineering perks: Innovation, space exploration (NASA/ESA roles).
• Risks: Burnout in residency (80-hour weeks), industry competition.

Future Trends in Higher Education and Cognition

With AI augmenting diagnostics (e.g., Stanford Medicine AI curriculum 2025), universities like Johns Hopkins evolve training toward hybrid skills. Future studies may compare AI-assisted cognition, per Imperial's ongoing work. Globally, understaffed fields need demystified perceptions to attract talent.

This research positions higher education as pivotal in nurturing domain-specific excellence, not mythical genius. 97

Photo by Dan Dodman on Unsplash