Evidence for Collection #

Every substantive claim on the Collection page is checked against current research. Here is each claim, how well today’s evidence supports it, and the sources. The full, de-duplicated source list lives on the references page.

Mixed · weak evidence — Students who took notes by hand learned more (especially on conceptual questions) than those typing on laptops, because handwriting forces selection and paraphrase while typing tends toward verbatim transcription.

The original 3-study finding is well known, but the headline ’longhand beats laptop’ result has not held up cleanly: a large pre-registered replication (Morehead et al., 2019) found no reliable longhand advantage, and a 2021 multi-site replication found small effects at best. The robust, replicable claim is the mechanism the page actually relies on — verbatim transcription harms learning relative to summarising — not that the writing tool itself is decisive.

Sources: Mueller, P. A., & Oppenheimer, D. M. (2014), The pen is mightier than the keyboard: Advantages of longhand over laptop note taking, Psychological Science 25(6), 1159-1168 · Morehead, K., Dunlosky, J., & Rawson, K. A. (2019), How much mightier is the pen than the keyboard for note-taking? A replication and extension, Educational Psychology Review 31, 753-780 · Urry, H. L., et al. (2021), Don’t ditch the laptop just yet: A direct replication of Mueller and Oppenheimer’s (2014) Study 1, Psychological Science 32(3), 326-339 · full reference ›

Supported · moderate evidence — Capturing material verbatim (word-for-word transcription) tends to produce weaker learning than note-taking that selects and rephrases the content in your own words.

Generative (summarising, paraphrasing, organising) note-taking reliably outperforms verbatim copying; the verbatim-overlap mechanism survived the replication debate even where the longhand/laptop main effect did not, and it aligns with the broader generation-effect literature.

Sources: Mueller, P. A., & Oppenheimer, D. M. (2014), The pen is mightier than the keyboard, Psychological Science 25(6), 1159-1168 · Morehead, K., Dunlosky, J., & Rawson, K. A. (2019), How much mightier is the pen than the keyboard for note-taking?, Educational Psychology Review 31, 753-780 · full reference ›

Supported · strong evidence — Highlighting and underlining are low-utility study techniques: as commonly used, they produce little durable learning benefit on their own.

Dunlosky et al.’s influential review rated highlighting/underlining ’low utility’, a verdict echoed in subsequent practice-recommendation summaries; benefits appear only when marking is sparse and paired with deeper processing, not from highlighting itself.

Sources: Dunlosky, J., Rawson, K. A., Marsh, E. J., Nathan, M. J., & Willingham, D. T. (2013), Improving students’ learning with effective learning techniques, Psychological Science in the Public Interest 14(1), 4-58 — https://doi.org/10.1177/1529100612453266 · Weinstein, Y., Madan, C. R., & Sumeracki, M. A. (2018), Teaching the science of learning, Cognitive Research: Principles and Implications 3:2 · full reference ›

Supported · moderate evidence — Highlighting can create a false sense of having learned the material (it feels like progress without producing it).

Passive re-exposure activities such as highlighting and rereading inflate fluency-based judgements of learning without commensurate retention gains, a well-documented metacognitive-illusion pattern.

Sources: Dunlosky, J., et al. (2013), Improving students’ learning with effective learning techniques, Psychological Science in the Public Interest 14(1), 4-58 · Bjork, R. A., Dunlosky, J., & Kornell, N. (2013), Self-regulated learning: Beliefs, techniques, and illusions, Annual Review of Psychology 64, 417-444 · full reference ›

Mixed · moderate evidence — Summarising material in your own words supports learning and understanding (e.g. the Cornell summary line, or restating a lecture’s main points).

Dunlosky et al. rated summarisation ’low-to-moderate’ utility because gains depend heavily on the learner’s skill at producing good summaries; well-executed, generative summarising (selecting, compressing, restating) does aid comprehension and retention, which is the practice the page recommends.

Sources: Dunlosky, J., et al. (2013), Improving students’ learning with effective learning techniques, Psychological Science in the Public Interest 14(1), 4-58 · Fiorella, L., & Mayer, R. E. (2015), Learning as a Generative Activity: Eight Learning Strategies that Promote Understanding — Cambridge University Press · full reference ›

Supported · moderate evidence — Putting new material into your own words and connecting it to what you already know (elaboration) strengthens learning, so capture habits that paraphrase begin that work early.

Elaborative processing — explaining how and why, and linking to prior knowledge — reliably improves retention and understanding; elaborative interrogation and self-explanation were among the techniques Dunlosky et al. rated more favourably than highlighting.

Sources: Dunlosky, J., et al. (2013), Improving students’ learning with effective learning techniques, Psychological Science in the Public Interest 14(1), 4-58 · Fiorella, L., & Mayer, R. E. (2015), Learning as a Generative Activity — Cambridge University Press · full reference ›

Supported · moderate evidence — Capturing material as diagrams or maps that pair words with a spatial picture gives a dual-coding benefit over linear text-only notes.

Dual-coding theory predicts a memory advantage when information is encoded in both verbal and visual/spatial channels; pairing words with an explanatory diagram is a standard, well-supported way to obtain it, consistent with multimedia-learning research.

Sources: Paivio, A. (1986), Mental Representations: A Dual Coding Approach — Oxford University Press · Mayer, R. E. (2021), Multimedia Learning, 3rd ed. — Cambridge University Press · full reference ›

Supported · moderate evidence — Highlighting too much of a text reduces its usefulness, because heavy marking removes the contrast that makes key points stand out and isolated marked items are remembered better.

Evidence indicates highlighting helps only when sparing and selective; marking large proportions of text removes the distinctiveness (von Restorff / isolation) that aids memory and offers no advantage over reading. Sparse, selective marking is the consistent recommendation.

Sources: Dunlosky, J., et al. (2013), Improving students’ learning with effective learning techniques, Psychological Science in the Public Interest 14(1), 4-58 · Yue, C. L., Storm, B. C., Kornell, N., & Bjork, E. L. (2015), Highlighting and its relation to distributed study and students’ metacognitive beliefs, Educational Psychology Review 27, 69-78 · full reference ›