영유아 집단 간 빈도 차이를 비교하여 언어 능력이나 연령이 낮을수록 말차례 빈도가 적어진다고 밝혔다.
By comparing the frequency difference between the groups of infants and toddlers, it was revealed that the lower the language ability or age is, the less frequency of turn-takings is.