A main source for the ages
From grammatical number to exact numbers: Early meanings of ‘one’, ‘two’, and ‘three’ in English, Russian, and Japanese
Barbara Wiseheart Sarnecka, V.G. Kamenskaya, Yuko YAMANA, T OGURA, Y YUDOVINA · 2006 · Cognitive Psychology
- Children
- About 160 children
- Where
- The United States, Russia and Japan
- Ages
- About 3 on average
- How
- Researchers asked children to give a puppet a number of toys
- What it found
- Children learned "one", "two" and "three" in the same order in all three languages, though the timing differed between languages.
- Limits
- Average counting results only; the shares at each step are in figures we haven't read.