Fact · Dictation
10weeks
New users' rate of words unknown to the recognizer leveled off at 0.36 per report after about 10 weeks.
Checked against its source on October 16, 2026
In the source's own words
“with a plateau of 0.36 (38 % more than the experienced users) achieved after approximately 10 weeks”
Learning Curve of Speech Recognition, Tomi A. Kauppinen et al., Journal of Digital Imaging, 2013, Results (unknown words).
Open the original (DOI 10.1007/s10278-013-9614-7)- What it measures
- An unknown word is a word the recognizer's dictionary did not contain. The plateau is where the curve flattened.
- What it does not show
- This measures vocabulary coverage, not how fast a user writes. It shows when the system stopped changing, not when the user had adjusted.