1995 Fiscal Year Final Research Report Summary
Phylogenetic comparison of manual action between humans and apes
| Project/Area Number |
06804057
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
人類学(含生理人類学)
|
|---|
| Research Institution | KYOTO UNIVERSITY |
|---|
Principal Investigator |
MASATAKA Nobuo Kyoto Univ.Primate Research Inst.Associate Prof., 霊長類研究所, 助教授 (60192746)
|
|---|
| Project Period (FY) |
1994 – 1995
|
| Keywords | Infant / Ape / Chimpanzee / Gesture / Phylogeny / Comparison / Communication / Social behavior |
|---|
| Research Abstract |
A notable event that occurs in the development of the infant's speech capabilities is the onset of babbling. Although the development of babbling culminates in "canonical syllable production", preceding stage is characterized by "marginal babbling", which has a well-formed margin (consonant) and nucleus (vowel) but includes a slow (more than 120 ms) formant transition. During this marginal babbling stage, specific pattern of manual action, rhythmic banging, is frequently performed by the infant, synchronizing with the babbling production. This synchronization helps the infant produce those sounds that with rapid formant transition, and once the infant acquires the motor skills to produce canonical babbling, diminishes. Deaf infants also utter marginal babbling. However marginal babbling stage never transits to canonical babbling stage. Furthermore such synchronization originates when the infant is still 4 month old, and appears first as synchronization between laughter and stereotypic leg movement, by which multi-syllabic sound production is facilitated.
|
