ESL job interview question: What do you know about Vygotsky?

Recommended answer:

Lev Semenovich Vygotsky (1896 –1934) was a Jewish Russian developmental psychologist and the originator of cultural-historical psychology. 

His most important contribution was in the field of language and thought. In his book Thinking and Speaking he established the profound connection between silent inner speech and oral language. He described inner speech as being qualitatively different from normal (external) speech. 

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