Font Legibility and Memory

ISEF Category: Behavioral and Social Sciences

Subcategory: Cognitive Psychology  ·  Difficulty: Intermediate  ·  Setup: Home Setup  ·  Time: 1 to 2 Months

The Hook

If a font feels harder to read, you might think it will stick in your brain better. That idea is called desirable difficulty. The catch is that newer replication studies have found mixed results. Your project can test whether the effect shows up in adolescent memory, using a preregistered web experiment.

What Is It?

Desirable difficulty means a task can feel a little harder to process, yet still help memory later. Legibility means how easy text is to read, and retention means how much you remember later. Sans Forgetica was designed to slow reading, Arial gives you a plain comparison, and handwritten text adds a different kind of effort.

Think of it like a small hill on a bike path. A little effort can build strength, but too much just slows you down. Your experiment checks whether teens remember a passage better after that extra effort, or whether the font just makes reading harder without helping memory.

Why This Is a Good Topic

This is a strong science fair topic because you can test it with a simple browser study and real data. It connects to how students read, study, and remember on screens, which makes the results easy to explain. You can also learn random assignment, preregistration, and basic statistics while keeping the project in reach for a high school team.

Research Questions

• How does font choice affect immediate recall of a short passage in adolescents?
• What is the effect of font choice on delayed recall after a short delay?
• Does the font effect change when the passage is academic versus narrative?
• To what extent do reading speed and recall move together across fonts?
• Which font produces the best balance of speed, accuracy, and later memory?
• How does self-reported reading effort relate to recall across font conditions?

Basic Materials

• Laptop or desktop computer with a stable internet connection.
• Browser-based experiment platform such as jsPsych.
• Spreadsheet software for random assignment, scoring, and cleanup.
• Three matched text versions in Sans Forgetica, Arial, and handwritten style.
• Consent and assent forms approved for teen participants.
• Short recall and comprehension questions.
• Simple timer or response log built into the experiment platform.

Advanced Materials

• Lab computers with calibrated monitors.
• Eye-tracking system for reading behavior.
• PsychoPy for controlled stimulus presentation.
• University participant pool access.
• R or Python for mixed-effects models and effect sizes.
• Screen luminance meter to check display consistency.

Software & Tools

• jsPsych: Builds a browser-based experiment with random assignment and timed text presentation.
• R: Runs descriptive statistics, effect sizes, and mixed-effects models.
• JASP: Lets you check t tests, ANOVA, and Bayesian results without paid software.
• Open Science Framework: Hosts preregistration templates, study files, and analysis plans.
• Google Sheets: Tracks assignment, scores, and preregistered exclusion rules.

Experiment Steps

1. Define the memory outcome you will measure, such as immediate recall, delayed recall, or both.
2. Choose one font variable to test first and keep text length, size, and layout constant.
3. Plan a between-subject assignment scheme so each participant sees only one font.
4. Build your scoring rule and preregister your exclusions, controls, and analysis plan.
5. Pilot the task with a few readers, then revise the interface before you collect real data.
6. Decide how you will report effect sizes, confidence intervals, and group differences.

Common Pitfalls

• Letting Sans Forgetica have wider spacing or a smaller size than Arial, which makes layout rather than font style drive the result.
• Comparing handwritten text on paper with typed text on screens, which mixes font effects with device effects.
• Giving different passages to each group, which turns text difficulty into a hidden confound.
• Scoring recall with vague free-response rules, which makes your data hard to compare across participants.
• Changing your exclusion rules after seeing the data, which can make a small effect look real when it is not.

What Makes This Competitive

A competitive version of this project would control the typography tightly, preregister the analysis, and report effect sizes instead of only a yes-or-no result. You could also test whether the font effect changes by reading level, passage type, or delay length. If you compare your result to the failed-replication literature and explain why your design differs, the project feels much stronger. Careful controls and a clear statistical plan matter more than a flashy font.

Project Variations

• Test the same font effect with younger students versus older teens.
• Compare typed text with neat handwriting and messy handwriting to separate legibility from effort.
• Measure delayed recall after one day instead of immediate recall to see whether effort helps memory later.

Learn More

• PubMed: Search review articles on font legibility, reading fluency, and memory.
• OpenStax Psychology 2e: Read the chapters on perception and memory for core concepts.
• MIT OpenCourseWare: Find free cognitive psychology lectures and reading lists.
• Open Science Framework: Look for preregistration templates and example study plans.
• PsyArXiv: Search for preprints on typography, reading, and replication studies.