You finish a vocabulary session with correct answers, then struggle with the same words several days later. That does not necessarily mean the session failed. Remembering immediately after practice and retrieving a word after a delay are different tests.
The forgetting curve is a way to describe how performance on a memory task can change with time. It is not a personal countdown telling you exactly when a word will disappear.
Avoid treating a chart as a prediction
A result from one experiment depends on its materials, learners, study procedure and final test. A percentage measured with unfamiliar word pairs cannot simply be applied to every conversation, language or app. WordPlus does not promise a universal retention rate.
Familiarity also matters. A word you hear at work every day gets practice outside your flashcards. An unusual word from a novel may receive no further exposure unless you deliberately return to it. Those words need not behave alike.
Run a delayed check on your own words
Choose a small set from something you have read. Check the meanings before studying, and keep the prompts clear. At the end of practice, record which words you can produce without looking.
Return on another day and test them again before revealing the answers. Note the type of error: forgotten meaning, wrong meaning, missing spelling, or inability to produce the word in the opposite direction. This tells you more about your next action than comparing yourself with a generic graph.
| Result at the delayed check | Useful next step |
|---|---|
| Correct meaning, uncertain spelling | Add a short written-recall exercise |
| Recognised the answer after revealing it | Keep practising with the answer hidden |
| Repeatedly confused two words | Give each a distinct example sentence |
| Easy on the card, missing in speech | Use the word in a new spoken response |
Space practice without chasing a perfect interval
The practical aim is to revisit useful vocabulary across different days. A scheduling tool can organise that routine, but the exact gap does not prove that you know a word permanently. Mark misses honestly and allow difficult material more attention.
The Leitner system makes this visible with groups of cards. If you use paper cards, boxes can serve the same organisational purpose. If you use WordPlus, review your due words and keep an eye on the cards that repeatedly cause trouble.
Keep learning outside the review session
Read another passage on the same topic, listen for the word, and try using it yourself. Do not count every encounter as proof of mastery; use those encounters to deepen the example attached to the word.
For the evidence behind retrieval practice, see Karpicke and Roediger's study. For a practical schedule, use our guide to replacing cramming with spaced sessions. Neither a chart nor an app can guarantee a fixed outcome for all learners.
