Chapter 3 - The Biological Foundations of Behavior
Psychology Around the Globe
The Brain's EEG Response to Language
Learning a language is an important milestone for a baby. It can change a
baby's world-and the babys brain. Psychologists have learned that people
who do not hear certain sounds when they are young have problems learning to
tell the difference between them. For example, many Japanese speakers cannot
tell apart American English's R and L, which are not used in the Japanese
language. Buchwald et al. (1994) decided to see if there was a physical
difference in the way that the brains of Japanese natives and Americans react
to the sounds of R and L. The researchers took electroencephalogram (EEG)
recordings from English-speaking Japanese and American adults. The subjects
listened to pairs of similar words beginning with R and L, like rip and lip,
and also pairs of sounds that began with other letters, like ba and pa. The
Americans showed a strong increase in brain electrical activity 250
milliseconds after they heard all words; the Japanese did too, but not for R
and L words. Otherwise, the EEGs looked the same. In spite of years of exposure
to English, the Japanese speakers' brains still did not react to sounds that do
not occur in Japanese.