Tip-of-the-Tongue Recall and Bilingualism

ISEF Category: Behavioral and Social Sciences

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

The Hook

Even fluent speakers can blank on a word they know well. The strange part is that your brain often gives you a sound fragment before it gives you the full word. That makes tip-of-the-tongue moments a neat window into memory and bilingual language control.

What Is It?

Tip-of-the-tongue moments happen when you know a word and can explain its meaning, but the sound will not come out. Think of it like knowing the file you want exists, but the file name is stuck behind a locked screen. This project looks at how often that happens across age groups and bilingual students, then checks whether the guessed word sounds close to the target.

Bilingualism can change how words are stored and retrieved, because your brain may keep more than one language active at once. Phonological similarity means how much two words overlap in sound, such as shared beginning sounds, syllable shape, or ending sounds. If a guess sounds close to the target, that can show which parts of the word the brain recovered first.

Why This Is a Good Topic

This is a strong science fair topic because you can measure it with surveys, coding, and basic stats, then turn it into a real question about language retrieval. It connects to memory, aging, and bilingual language processing, which are all active research areas. You can also learn how to build a survey, clean text data, compare groups, and score sound similarity without needing a full lab.

Research Questions

• How does age group change the frequency of tip-of-the-tongue events?
• How does bilingualism status change the frequency of tip-of-the-tongue events?
• To what extent does self-rated language dominance predict tip-of-the-tongue frequency?
• Which phonological similarity score best matches reported guesses to target words?
• What is the effect of target-word frequency on tip-of-the-tongue reports?
• Does bilingualism change how phonologically similar reported guesses are to the target word?

Basic Materials

• Online survey form with consent and assent fields.
• Laptop or desktop computer.
• Spreadsheet software.
• Word list or prompt set of target items.
• Participant recruitment script.
• Age and language background questionnaire.
• Response coding sheet with a phonological similarity rubric.

Advanced Materials

• Institutional participant pool.
• IRB-approved consent system.
• Python with pandas and NumPy.
• CMU Pronouncing Dictionary or another pronunciation lexicon.
• Statistics package such as R or JASP.
• Audio recording headset if you collect spoken guesses.
• Qualtrics or another survey platform with randomization tools.

Software & Tools

• Google Forms: Collects tip-of-the-tongue reports and background data.
• Google Sheets: Sorts responses and tracks coding decisions.
• Python: Cleans text, joins survey data, and runs similarity analysis.
• JASP: Runs group comparisons and effect size checks.
• spaCy: Helps standardize word forms before phonological coding.

Experiment Steps

1. Define whether you will study age, bilingualism, or both, and choose group cutoffs before collecting data.
2. Build a survey that captures the target word, the reported guess, and language background in the same format for everyone.
3. Choose one phonological similarity rule, such as shared sounds or phonetic distance, and write it down before coding responses.
4. Plan your control groups and comparison groups so differences in vocabulary difficulty do not confuse the results.
5. Set up your analysis plan for frequency counts, similarity scores, and group comparisons before you see the data.
6. Decide how you will flag missing, duplicate, or unclear responses so your final dataset stays consistent.

Common Pitfalls

• Mixing up tip-of-the-tongue moments with simple forgetting, which inflates your counts.
• Letting participants see hints or target answers too early, which changes the guess they report.
• Using different word lists for different groups, which makes age or bilingualism look stronger than it is.
• Scoring phonological similarity by intuition instead of one written rule, which makes your coding inconsistent.
• Comparing bilingual participants without recording which languages they use most, which hides the real pattern.

What Makes This Competitive

A stronger version of this project goes beyond counting responses and shows that your measurement is careful. You can raise the level by using a clear similarity metric, tighter group definitions, and a statistical model that handles word difficulty and participant differences. If you also compare more than one way of scoring sound similarity, your results can answer a sharper research question. That turns the project from a simple survey into a real language-processing study.

Project Variations

• Compare tip-of-the-tongue frequency across monolingual, balanced bilingual, and heritage bilingual students.
• Measure whether low-frequency words trigger more similar guesses than high-frequency words.
• Test whether phonological similarity changes when participants answer in their stronger language versus their weaker language.

Learn More

• PubMed: Search review articles on tip-of-the-tongue states, bilingual lexical access, and word retrieval.
• NCBI Bookshelf: Find free textbook chapters on memory, language production, and lexical access.
• MIT OpenCourseWare: Look for cognitive psychology and language courses that explain retrieval and bilingualism.
• Google Scholar: Search for recent papers on tip-of-the-tongue frequency and phonological similarity.
• Journal of Memory and Language: Read peer-reviewed studies on naming, retrieval, and bilingual word finding.