日時
2025年 10月3日（金曜日） 10:00 ~ 12:00
会場
講演者
Irena Lovčević
（International Research Center for Neurointelligence (WPI-IRCN), The University of Tokyo Institutes for Advanced Studies）
演題
"Home speech environment of Japanese infants: evidence from long-format recordings"
概要
In this talk I will present the project examining the composition of early infants' speech environment and its effects on infants' language outcomes by using a unique dataset of large-scale naturalistic language environment data obtained in home settings. Data were collected from 30 infants longitudinally every three months starting at infants' age of six- until 18-months, allowing an assessment of the evolution of input composition over time. The talk will focus on the quantity of speech input and infants' vocalizations. Quantity of adult speech that infants are exposed to was quantified as the frequency of adult speech per recording hour at infants' ages of 6, 9, 12, 15, and 18 months using Voice Type Classifier (VTC, Lavechin et al., 2020). The results demonstrated a significant effect of Age with the quantity of adult speech input being higher at 9 compared to 6, 15, and 18 months. These findings might be explained via infants' motor activity that was measured via accelerometer and showed the comparable pattern to the speech input.
主催・共催
主催：慶應義塾大学 皆川研究室 赤ちゃんラボ
共催：KGRI未来共生デザインセンター