The Benefits of Self-Explanation While Studying
# The Benefits of Self-Explanation While Studying
There is a deceptively simple study technique that most people never use: explaining the material to yourself as you learn it. Not reading it. Not highlighting it. Not copying it. Explaining it - in your own words, step by step, as if you were teaching someone who was not in the room.
This is self-explanation, and decades of research show it is one of the most effective ways to deepen understanding and improve retention. It works across subjects, age groups, and skill levels. And it costs nothing except cognitive effort.
What Self-Explanation Is
Self-explanation is the practice of generating explanations for yourself about the material you are studying. It was first studied systematically by Michelene Chi in the early 1990s. In her seminal research, Chi observed students working through physics problems and biology texts. She found that students who spontaneously explained the material to themselves - asking "why does this happen?" and "how does this connect to what I already know?" - learned significantly more than those who simply read through the material.
The key distinction is between reading for coverage and reading for understanding. When you self-explain, you are actively constructing meaning rather than passively absorbing text.
Self-explanation includes activities like:
- Explaining why a step in a worked example is necessary
- Articulating how a new concept connects to previously learned concepts
- Identifying the principle underlying a specific fact or procedure
- Paraphrasing a complex passage in simpler terms
- Questioning why something is true rather than just noting that it is true
The Research Evidence
The evidence for self-explanation is extensive and consistent.
Chi's original 1989 study found that "good" students (those who performed well on physics exams) generated significantly more self-explanations while studying worked examples than "poor" students. This was not just a correlation - the self-explanations appeared to cause the deeper understanding.
A follow-up study by Chi and colleagues trained students to self-explain while reading a biology text. The trained students showed dramatically better comprehension on post-tests compared to a control group that simply re-read the text twice. The self-explanation group spent the same total time on the material - they just used that time differently.
Dunlosky and colleagues, in their landmark 2013 review of ten learning techniques, rated self-explanation as a technique with "moderate" utility - effective across a wide range of conditions, though they noted it requires some training to use well. They found it particularly beneficial for learning conceptual material and for integrating new information with prior knowledge.
More recent research has extended these findings. Bisra and colleagues conducted a meta-analysis of 69 self-explanation studies and found a consistent positive effect on learning outcomes, with larger effects for conceptual understanding than for factual recall.
Why Self-Explanation Works
It Forces Active Processing
Reading is fundamentally passive. Your eyes move across the page, and information flows in. Self-explanation interrupts this passive flow and forces active engagement. You have to stop, think about what you just read, and generate an explanation. This active processing creates stronger memory traces.
It Reveals Knowledge Gaps
When you try to explain something and cannot, you have discovered a gap in your understanding. This is enormously valuable. Without self-explanation, these gaps remain invisible - you continue reading, assuming you understand, until an exam question exposes the gap.
Self-explanation acts as a continuous comprehension check. Each explanation is a test of your understanding. When you pass, you move forward with confidence. When you fail, you know exactly where to focus your attention.
It Builds Connections
Self-explanation naturally involves connecting new information to existing knowledge. When you ask "Why is this true?" or "How does this relate to what I learned yesterday?" you are building a network of associations around the new information. Connected knowledge is more durable and more useful than isolated facts.
It Promotes Inference
Texts and instructional materials often leave implicit connections between ideas. Self-explanation forces you to make those connections explicit. In doing so, you go beyond what was directly stated and construct a richer, more complete understanding of the material.
Chi called these "inference-generating" self-explanations and found they were the most predictive of learning outcomes. Students who made inferences while self-explaining outperformed those who merely paraphrased the text.
How to Self-Explain Effectively
The Basic Method
After reading a paragraph or section, pause and explain to yourself - out loud or in writing - what you just learned. Cover the text if possible. Use your own words, not the author's.
Ask yourself:
- What was the main point of this section?
- Why is this important?
- How does this connect to what I already know?
- What is the underlying principle?
- If I had to explain this to someone else, what would I say?
With Worked Examples
When studying worked examples (in math, science, programming, or any problem-solving domain), do not just read through the solution. For each step, ask:
- Why was this step taken?
- What rule or principle justifies it?
- What would happen if this step were skipped?
- How does this step get us closer to the solution?
Research shows that self-explaining worked examples is especially powerful because it helps learners understand the deep structure of problems, not just the surface procedures.
With Conceptual Material
When studying concepts, theories, or processes, focus your self-explanations on causation and relationships:
- What causes this to happen?
- What would change if one variable were different?
- How is this similar to or different from related concepts?
- What are the boundary conditions - when does this apply, and when does it not?
With Factual Material
Even with factual material (dates, definitions, classifications), self-explanation adds value:
- Why is this classified this way and not another?
- What is the significance of this fact?
- How does this fact relate to the broader framework?
Self-Explanation vs. Other Strategies
Self-Explanation vs. Re-Reading
Re-reading is passive and produces minimal learning gains. Self-explanation requires active generation and produces significant gains. Research consistently shows self-explanation is far superior.
Self-Explanation vs. Highlighting
Highlighting creates an illusion of engagement while remaining essentially passive. You are selecting text, not understanding it. Self-explanation requires you to produce understanding, not just identify important-looking passages.
Self-Explanation vs. Summarization
Summarization is related to self-explanation but is typically more superficial. A summary captures the main points. A self-explanation captures the main points and explains why they matter, how they connect, and what principles underlie them.
Self-Explanation Combined With Retrieval Practice
Self-explanation and retrieval practice are complementary strategies. Self-explanation deepens initial understanding. Retrieval practice strengthens long-term retention. Using both - self-explaining during initial study, then testing yourself later - is more effective than either strategy alone.
Making It a Habit
Self-explanation does not come naturally to most people. It requires deliberate practice to become a habit. Start with these steps:
- Begin with one study session. Choose a single reading or topic and commit to self-explaining every major point.
- Use prompts initially. Write the questions listed above on a card and refer to them until they become automatic.
- Speak out loud. Verbal self-explanation is often easier than written, and the act of speaking forces more complete explanations than silent thinking.
- Check yourself. After self-explaining, recheck the source material. Were you accurate? Did you miss anything? Did you understand the relationships correctly?
- Increase gradually. Expand self-explanation from one session to your full study routine.
The initial investment in time and effort pays off quickly. Students who self-explain spend roughly the same total time on material but learn it more thoroughly. That means less re-studying, less cramming, and better performance.
The simplest version of self-explanation is this: after reading something, close the book and ask yourself, "What did I just learn, and why does it matter?" If you can answer clearly, move on. If you cannot, go back and engage more deeply. That single question will transform your studying.
Pair self-explanation with active recall tools for deeper, lasting learning ->