Ferdinand, R. F., van Lang, N. D. J., Ormel, J., & Verhulst, F. C. (2006). No distinctions between different types of anxiety symptoms in pre-adolescents from the general population. Journal of Anxiety Disorders, 20, 207-221.
Many different anxiety symptoms exist; fear of the dark, fear of doing a presentation, fear of doing things alone, fear that a war will begin, panic attacks on the street etc. For a long time it has been questioned whether it would be useful to make a distinction in these various types of anxiety. For the TRAILS-youth this was not found to be useful. It was found that, instead of asking what someone is afraid of, it is more useful to ask exactly how scared someone is and how often someone is scared. This is valuable information. Moreover, there are so many things that one can be scared of, and asking about all the different things is therefore not necessary when tracking anxious adolescents in the general population.