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How to map a research field in one morning

Lennart Nacke, PhD June 9, 2026
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Big shoutout to our Authority Lab cohort Barbara, Kenton, Ulu, Maricris, Michael, Ayca, Kim, Ahmed, Fiona, Pavla, Jia, Adi, Velai, Kirsten, Kitt, Orus, Tarek, Rachel, Leanne, Shaantanu, Shashi, Genevieve, Paul, and Tamsen, who are shaping this community as we are open to registrations now with biweekly office hours with me, once-a-month deep AI tutorials, and once-a-month open coaching sessions in front of the community. And we’re excited to host our first ​monthly mastermind​:

The administrative swamp eats 14 hours of your week. Meetings, emails, and tasks you do not need to do. I’ll spare you the generic productivity hacks. On ​June 11 at 11:30 AM Eastern​, I am showing the 7 habits that close those leaks on my own calendar. We will schedule the 3 habits that buy back the most time for your research and writing. Beth, Ijeoma, José, Rabeya, Frances, Dianna, Amy, and Nikita already registered by today. ​Register here to save your seat.


Academic training made you good at one game and left you losing another. For years it rewarded a single audience, the two or three reviewers who sign off on your work, so you learned to read every paper cover to cover and catch every gap. Your instinct earned their approval. But in the visibility economy, this is burying you. While you grind through 50 papers, the writing that would make your expertise visible never ships, and obscurity wins by default. You slowly come to understand that the real bottleneck here is how you time your selection decisions. You waste a day deciding what to read while you read it. I urge you to make the call before you open the paper. Here's the system I use to map a field before lunch, it saved my weekends and pulled our last paper's remaining literature together in under 48 hours.

The speed-reading trap

I spent 20 years reading research the slow way, cover to cover, like most of the early PhD students I supervise. I used to open the first paper in a stack, read it line by line, examine every figure, and take dense notes. I believed highlighting and verbatim note-taking would lock the knowledge in. Cognitive science shows us this is an illusion. I love Zebra Midliners, but highlighting isn’t very effective. It locks your attention onto single ideas and buries the links between them. Those links are what let you make inferences and learn. Highlighting can even hurt how we make inferences.

One for the keeners in my lectures. Transcribing what you hear word for word won’t help you understand the ideas either. Copying closely isn’t enough for deeper understanding. It can hurt your performance on conceptual and application-based tasks. Mere transcription of thought relies on shallow processing. Writing key ideas in your own words, a process called generative note-taking, helps you learn much better. You pick key points, condense them, and rephrase in your own words. Then, you connect those ideas. Notes are useful only if you actively process them. Without active processing, you only look like you’re reading. But you won’t remember anything.

The secret to processing 50 papers lies in your selection criteria. You succeed by refusing to read all 50 in the first place.

Skimming is shallow reading with your comprehension switched off. Relying on it to get through your reading list is how you waste a full day. Trust me, I’ve done it.

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Sort before you read a line

The goal is to decide what matters before you open a single document. The way I do this is to start with an assessment and a prioritization.

I take my stack of 50 papers and sort them into three piles. I do this using only the titles, abstracts, and figures. I keep the process simple to build momentum and save the difficult work for later. Here are the three sorting piles:

Pile A holds my deep-read targets. These are the three to seven papers my argument actually depends on. I’ll read these with close attention. One test sorts them. A Pile A paper is one my thesis can’t survive without, because it supplies my core theoretical framework or the exact method I am replicating.

Pile B holds only my mapping targets. These are the 15 to 20 papers I need to know exist to understand the boundaries of the debate, but that I don’t need to master. I put a paper here if it contextualizes my research question. It shows me who else is playing in the space. It also gives background stats and notes the viewpoints I should weigh.

Pile C is my park or discard pile. The remaining papers go here. Make this decision in under two minutes per paper. If the paper’s main finding doesn’t connect to your research question, put it in Pile C. Don’t hold on to papers because they’re interesting or written by famous authors.

My oldest mistake was treating all 50 as equal. I spent all my time on the first few documents and never got to the three papers that really mattered. Now I run the sort during the week with my research question written on an index card in front of me. If a paper doesn’t directly answer that question, it goes to Pile C immediately.

The three-pass system

The framework I use for Pile B and Pile A comes from the three-pass method introduced by Keshav (2007). In his classic paper, “How to Read a Paper,” he shares a clear method. This method connects your deep reading to the process of making decisions.

I’ll spare you the academic jargon and show you how it works in practice.

Each pass narrows the field. Pass one runs across both Pile B and Pile A. Only Pile A survives into pass two, and just the two or three must-read papers reach pass three.

Pass one is a quick five-minute scan. Focus on the title, abstract, introduction, section headings, and conclusion. You glance at the references to see who is being cited. At the end of the five minutes, you must answer his five C’s:

  1. Category: What type of paper is this?
  2. Context: What other work does it connect to?
  3. Correctness: Do the assumptions hold?
  4. Contributions: What’s the main claim?
  5. Clarity: Is it well written?

A shallow skim has no exit criteria. The five C’s give you five, and they make you read the paper’s structure. That’s how you process a reading list in a morning.

Spend about one hour on pass two, focusing solely on Pile A. Read the paper carefully, study each table, and note references to follow up later. If you hit a difficult proof or a dense mathematical block, you put it down. The common mistake here is rereading the same page five times. Keshav’s fix is to leave the hard parts for the next pass, and I love it.

Pass three takes four to five hours, and few papers in your pile warrant that much time. Reserve this pass for the two or three papers you must master or review. You rethink the study, question every assumption, and spot all the gaps.

Structure your reading in a concept matrix

A bibliography is a list of who said what. Build a review around authors and you get a string of summaries with no synthesis.

Jane Webster and Richard Watson made this point in their paper, Analyzing the Past to Prepare for the Future: Writing a Literature Review (Webster & Watson, 2002). They were tackling a shared issue in doctoral education and research. The issue is reviews that summarize past research in order, listing each contribution. This structure lacks synthesis and fails to expose gaps. To solve this, they introduced the concept matrix as a method to force researchers to structure literature around ideas. Their whole goal was to make a literature review concept-centric.

I built a concept matrix. Rows are papers. Columns are claims, methods, samples, and findings. The matrix turns 50 separate documents into one map you can work from.

For example, a concept matrix for research on educational gamification might look like this:

Concept matrix: educational gamification Paper / Source Self-Determination Theory (SDT) Leaderboards Extrinsic Motivation Method Key finding
How gamification motivates Yes Yes No Experiment Badges, leaderboards, and performance graphs raise competence need satisfaction and perceived task meaningfulness.
Assessing the effects of gamification in the classroom Yes Yes Yes Longitudinal field study Over a semester, leaderboards and badges lowered students' motivation, satisfaction, and final exam scores.
An empirical test of the theory of gamified learning No Yes Yes Experiment Students with a leaderboard spent far more time on task, and that time raised their academic performance.

Laying each paper out in a breakdown like this makes the gaps obvious. If five papers share the same experimental design and ignore motivation, start your next paper there.

Three AI checkpoints worth considering

First, I use semantic academic search engines like Consensus or Google Scholar Labs before collecting documents. I skip the hassle of boolean keywords and just type my research question into the search bar. This method finds important papers that regular keyword searches miss. It speeds up my discovery process.

Second, once I’ve collected these papers, NotebookLM is excellent for finding where they disagree. I prompt, “Where do these papers contradict each other?” The tool shows the passages, and I click the citations to verify the source material on the spot.

Third, Claude is useful for drafting the synthesis from a concept matrix. Instead of copy-pasting raw text, I upload the matrix either as a CSV, an Excel file, or provide a link to the Google Sheet where it lives. This lets Claude ingest the structured data cleanly, so I can ask it to draft the synthesis and argue against my interpretation.

Never trust either tool to generate a citation. The risk of fabrication is high, and grounding only lowers that risk.

I tell my graduate students and research coaching clients to run this workflow during the week. They don’t need to work weekends. They process their 50 papers in business hours because they stop trying to read every word. This system kills the need to read all 50 papers. You read the few your argument stands on and map the rest.

AI can compress a whole literature faster than any of us. The judgment of what to read yourself stays with you. That’s how our last paper’s literature came together in 48 hours, with one index card on the desk.

Your turn. Grab your next stack of 50 papers, sort them into three piles before you open a single file, run the three passes, and drop what survives into a concept matrix. Give it one morning. Then hit reply and tell me what your index card said.

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Bonus

This week, premium subscribers get a print-ready concept matrix workbook, the full one-morning field-mapping protocol as a checklist, three AI prompts (triage 50 abstracts into three piles, run the five C's on any paper, and turn a gap into your paper's angle), and five curated resources on academic reading and synthesis.

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