Quick Answer
Assess vocabulary by checking four different things: how many useful words your child recognises, how deeply those words are understood, how easily they can be retrieved without prompts, and whether they can be used accurately in new reading, speaking and writing situations. A single spelling test or definition quiz cannot measure all four.
What This Page Owns
This page owns an informal parent diagnostic. It helps decide what to teach next; it is not a standardised test and should not be used to diagnose a language disorder. For level-based word material, use the eduKate Vocabulary Hub.
The BDRU Vocabulary Profile
| Dimension | What to ask | Weakness looks like |
|---|---|---|
| Breadth | Do you recognise this word? | Many key school words are unfamiliar |
| Depth | What does it mean, contrast with and combine with? | Meaning is vague or overgeneralised |
| Retrieval | Can you recall it without the list? | Knows it when shown but cannot produce it |
| Use | Can you apply it in a fresh context? | Sentence is grammatically or semantically wrong |
A 15-Minute Home Check
- Select ten words from the child’s current school level: some familiar, some recently taught, some less familiar.
- Ask which words are recognised and which are unknown. Do not teach yet.
- For five recognised words, ask for a child-friendly meaning, example, synonym or contrast.
- Remove the list for five minutes, discuss something else, then ask the child to recall as many as possible.
- Ask the child to use three in fresh sentences or a short paragraph.
Record the first point of failure. If breadth is weak, increase meaningful exposure. If depth is weak, teach relationships and examples. If retrieval is weak, use spaced recall. If use is weak, practise collocation, grammar, tone and transfer.
Do Not Mix Recognition with Mastery
A multiple-choice answer can be correct because the distractors are poor. A memorised definition can be repeated without understanding. A sentence can include an advanced word inaccurately. For that reason, use at least two forms of evidence before treating a word as secure.
Age-Appropriate Evidence
- Lower Primary: picture choice, oral meaning, simple contrast and one spoken sentence.
- Upper Primary: definitions in own words, word families, context clues, delayed recall and composition use.
- Secondary: nuance, register, disciplinary meaning, collocation, paraphrase and argument use.
Build a Four-Week Baseline
One session can be distorted by fatigue or topic familiarity. Sample small sets across four weeks and look for stable patterns. The useful question is not “How many words does my child know?” but “Which kind of vocabulary knowledge is limiting performance right now?”
Common Assessment Mistakes
- Testing only spelling and calling it vocabulary.
- Using words far above the child’s reading level.
- Teaching during the diagnostic and then counting prompted answers as independent.
- Comparing siblings instead of tracking the same child over time.
- Chasing a large number while ignoring accurate use.
When to Escalate
If concerns extend beyond vocabulary—such as persistent difficulty understanding everyday language, hearing concerns, marked regression or broad school difficulties—discuss the pattern with the child’s teacher and an appropriately qualified professional. This guide is for educational planning, not diagnosis.
Research and Further Reading
- National Reading Panel: vocabulary and comprehension
- Cambridge overview of vocabulary size and word lists
- Laufer & Aviad-Levitzky: vocabulary knowledge and reading comprehension
Use the results to choose level-appropriate resources from the Vocabulary Hub, then apply the eduKate Vocabulary Learning System to teach, retrieve and transfer each word.
