The role of a teacher in teaching languages to adults is not clear. By roles, I mean, for example: facilitator, manager, assessor, resources, participant and counselor.

Suppose learners concentrate on English (or another wide spread language) as second language where lots of learning materials are available and accessible, so the teacher is not the only available source of knowledge.

Also let's assume that we are talking about adult learners.

Are there studies that show what kinds of roles a teacher has in language acquisition?

I'd like to remind that I am interested in adult learners that already have life achievements, that are professional/qualified workers, graduated, able to process materials as part of their job duties (but not necessary related to linguistics) without nanny/nurse/tutor (like that is needed for children)...

I am looking for provable data based on research of groups, not for a personal or expert opinion.

  • The role of the teacher is to teach. Why do you need evidence for this? Also, what do you mean by "What is statistical significance of teacher in language learning?"?? The teacher's role is didactic, not statistical. – Christophe Strobbe Jan 9 at 15:46
  • The role of coursebooks, MOOC, self-study guides are to teach. Attending class means right school, methodology, professional tutor. If you are an adult you have duties and spending time/money on teacher should be justified. There are a lot of things to consider. For example how does teacher help with listening? Shouldn't you listen to radio/TV/youtube alone? There are plenty guides about passing exams. What is the benefit of teacher when you can check answer with keys? – gavenkoa Jan 9 at 15:56
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    I think it is reasonable to ask how effective is teaching with a teacher present versus self-studying in terms of the time spent. I would assume that the second has huge variance and the first might also have, or maybe not, so it is not obvious one can say anything definitive. But maybe this has been studied. – Tommi Brander Jan 9 at 18:58
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    A related question might be: how much does teacher's ability affect learning outcomes? There is research on this on mathematics, where the amount of mathematics studies was used as a proxy for mathematical ability. – Tommi Brander Jan 9 at 18:59
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    I did a somewhat bold edit to focus this to only a single question about what kinds of roles a teacher has in adult education and when teaching languages. There were two other questions here, one about how big an effect the teacher has, and one if you should learn on a course or independently. The former is a good separate question, while the latter is usually a poor fit for SE site. Roll the edit back or re-edit if it is unreasonable. – Tommi Brander Jan 10 at 10:54

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