Case Study 11.2: The Sketch-Note Experiment

The Setup

The instructor had been suspicious of sketch-noting for years.

Professor Marlena Chen taught introduction to design theory at a mid-sized state university, and she had watched the sketch-noting trend spread through her department with the mild skepticism of someone who'd been teaching long enough to see trends come and go. Her lectures were dense with theoretical concepts — semiotics, Gestalt principles, affordance theory, the relationships between form and function — and when she saw students drawing little icons and boxes around their notes instead of writing carefully organized text, she worried they were decorating rather than learning.

She was also, at the same time, bothered by a persistent pattern she couldn't explain: her most visually inclined students — the ones who seemed most engaged during lectures, who asked the most insightful questions, who drew constantly in their sketchbooks — were not always performing the best on her written exams. And some of her most dutiful note-takers — the ones who produced dense pages of organized text — would bomb application questions.

In the fall semester, she decided to find out what was actually happening.

The Experiment

Professor Chen partnered with a colleague in the psychology department to run a simple study across two sections of her Introduction to Design Theory course. The course met twice a week. For the first five weeks of the semester, both sections received identical lectures using her standard slides and teaching approach. The only difference: students in Section A were instructed to take notes however they normally did. Students in Section B were given a one-hour workshop in sketch-noting at the start of the semester and were required to use the technique for all lecture notes.

The sketch-note workshop covered the basics: dividing your note space into areas for text and areas for images, using simple icons (no artistic skill required), creating visual hierarchies with boxes and arrows, capturing process flows with sequence diagrams. Students practiced on a sample lecture about color theory — safe, concrete material they could visualize easily.

Then both sections attended the same five weeks of lectures. Professor Chen was careful to teach identically across both sections — same content, same examples, same order.

At the end of five weeks, both sections took the same exam: a combination of factual recall questions (define affordance, name the Gestalt principles), application questions (identify which Gestalt principles are operating in this advertisement), and synthesis questions (analyze this product design using the theoretical frameworks from the course).

The Results

On factual recall questions, the two groups performed roughly equivalently. Both sections defined "affordance" and listed the Gestalt principles at about the same rate. Text-only notes are perfectly good for storing definitions and lists.

On application questions, Section B (sketch-note) outperformed Section A by roughly one full letter grade on average. When given an advertisement and asked to identify operating Gestalt principles, sketch-note students were more accurate and gave more complete answers.

On synthesis questions — the hardest items, requiring students to analyze an original design they hadn't seen using multiple frameworks — Section B outperformed Section A by an even larger margin.

When Professor Chen looked at the actual note samples from both groups, the pattern made sense. Section A students had detailed, organized text — definitions, examples, bulleted lists. It was all there, verbally. But when a novel application question appeared, students had to translate from their abstract verbal understanding to the actual visual experience of looking at an advertisement. That translation step was difficult, and many students got it wrong.

Section B students' notes looked chaotic by comparison. But they included rough sketches of the actual examples from lecture — a quick drawing of the figure-ground illusion, an arrow showing how the eye moved through a layout, a spatial diagram of how proximity grouped elements. When a novel application question appeared, these students could do something the text-only students couldn't: they could visually compare the new stimulus to their sketched examples. They had a visual reference point.

The Qualitative Data

After the exam, Professor Chen collected student reflections from both sections about their studying and note-taking experience.

Text-only students most commonly reported: - "I had all the information written down but had trouble applying it." - "I understood the concepts but couldn't figure out what to look for in the images." - "I kept rereading my notes but still felt unsure about the application questions."

Sketch-note students most commonly reported: - "I understood the material differently — I could see what it meant." - "Drawing during the lecture helped me figure out if I actually understood it or not." - "I used my drawings while studying and it clicked faster than when I just read." - "My notes looked messier but I knew the content better."

A handful of sketch-note students reported struggling: - "I fell behind in the lecture trying to draw things." - "I'm not visual so the drawing felt unnatural." - "Some of the theoretical content didn't seem drawable."

Professor Chen noted that the students who struggled most were those who tried to make their sketches elaborate and accurate — more illustrative than mnemonic. The students who benefited most had treated the sketches as quick, rough spatial reminders rather than accurate drawings.

What Professor Chen Changed

The experiment changed how Professor Chen taught. She began incorporating sketch-note encouragement into all her courses, with a few specific practices:

She started providing "sketch frames" for her most complex concepts — simple blank diagrams with labeled sections that students could fill in with their own drawings during lecture. This gave students the scaffolding to start visualizing without the cognitive overhead of deciding what shape the visual should take.

She introduced brief "draw-what-I-just-said" pauses during lectures — thirty seconds where students would put down their pens, look up from their notes, and then quickly sketch the concept she'd just explained without looking back at the slide. These pauses produced a low-stakes retrieval + sketching combination she found remarkably effective.

She stopped worrying about notes looking organized. Organized-looking notes, she had discovered, correlated with text-only transcription. Messy-looking notes often meant generative, visual thinking.

The Lesson That Surprised Her Most

What struck Professor Chen most wasn't the performance difference, though that was meaningful. It was something a student named Rafael said during office hours a week after the exam.

He'd been in the sketch-note section. He'd gotten an A on the application questions. She asked him to describe how he'd studied.

"I mostly looked at my drawings," he said. "When I was reviewing for the exam, I'd look at a sketch from my notes and try to describe it out loud — like, what it was showing, what concept it represented. And then I'd try to come up with a new example from my own life."

He paused. "I actually didn't reread my text notes much. The drawings were enough to get me to the ideas, and once I had the idea, I could explain it."

He'd independently invented something very close to the ideal dual coding review practice: use the visual representation as a retrieval cue to generate the verbal content, then apply the concept to new examples. The sketch had served as an access point to the deeper conceptual knowledge — exactly the function that Paivio's dual coding theory predicts.

Professor Chen hadn't told him to do this. He'd figured it out because the sketch-notes naturally invited it. The visual form prompted a visual-to-verbal translation, which is precisely the kind of active retrieval that builds durable learning.

The pictures, it turned out, weren't decoration at all. They were the most efficient studying Rafael had done all semester — and he'd stumbled onto them by accident.