Correct errors in EFL

Correcting Student Errors in EFL

When and how to correct students errors in the EFL classroom is an issue of concern for every EFL teacher. What should we correct, when should we correct it, and how should it be corrected?
How do we give students the feedback they need and want to improve without damaging fluency and motivation?
Research Suggests . . .
Research tends to indicate that three types of errors should be addressed: high frequency errors, stigmatizing errors, and errors that block meaning or the understanding by the listener. I might add another: errors in using the target language of the lesson.
When and how should these errors be corrected? There is, unfortunately, no conclusive evidence/research about these issues.
Research seems to indicate that the most effective ways to deal with errors and offer corrections seem to include:
When hearing an error, speak the corrected statement
Listen for errors and make a general review of them at the end of the activity segment
Encourage peer correction
Correct the student personally (use this less than the other methods)