In an article I wrote a few weeks back I talked about Anxiety in the foreign language classroom and the detrimental effect that it can have for learners, and how they choose to progress their further learning endeavors in a language, especially with Less Commonly Taught Languages (LCTLs). I wanted to share some of the research I found on the subject to back up my claims, as well as to give more adequate information to anyone that has chanced upon this blog.
An article from Jstor: Listening Comprehension and Anxiety in the Arabic Language Classroom by Hussein Elkhafaifi. Link: http://www.jstor.org/stable/3588681
An article from Science Daily: Anxiety's Hidden Cost In
Academic Performance
Link: http://www.sciencedaily.com/releases/2009/06/090623090713.htm

The full article which I wrote before this is here: http://lostprofessor.com/lt/2009/07/anxiety-sources.html