* Vocabulary development varies widely: Children develop language at different paces. Some might know significantly more words than others at the same age.
* Types of words count: Do we include only spoken words, or also written words? Do we include technical terms or only common vocabulary?
* Methods of measurement: Different studies use different methods to assess vocabulary. Some use standardized tests, others rely on parent reports, and still others use direct observation.
However, here's a general range:
* Estimates suggest an average 8-year-old knows around 10,000 words.
* This number can range from 5,000 to 15,000 or more.
It's important to remember that these are just averages. The most important thing is that your child is developing language at their own pace and enjoying communicating.