Sentence:  While high anxiety children achieve significantly less well ( * * f ) in the unstructured school than do low <WSD>anxiety</WSD> children , they appear to do at least as well as the average in the structured classroom . 
Meaning of the word marked with <WSD> tags:  (psychiatry) a relatively permanent state of worry and nervousness occurring in a variety of mental disorders, usually accompanied by compulsive behavior or attacks of panic