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The Van Dream Anxiety Scale: A Subjective
Measure of Dream Anxiety in Nightmare Sufferers
Mehmed Y. Agarggn, M.D., Hayrettin Kara, M.D., Mustafa Bilici, M.D., Ali Savas Cilli, M.D., Metin Telci, M.D., Umit Basar Semiz, M.D., Cengiz Basoglu, M.D.
It is important to measure dream anxiety in nightmare sufferers and there is a need to
provide an instrument with good clinimetric properties. The purpose of this article was to
describe the Van Dream Anxiety Scale (VDAS) and to examine its internal homogeneity,
test-retest reliability, and validity. The VDAS was administered to two groups of subjects,
patients with nightmare disorder (NA) (N=36) and healthy controls (N=40), during an 18-
month study period. To evaluate the clinimetric and psychometric properties of the VDAS,
Cronbach s a and Pearson correlation analysis, paired t tests, and student�s t test were
performed. The thirteen questions were internally consistent. The total scores and
individual responses were stable across time. The scale was also valid and could
discriminate patients with nightmares from controls. The VDAS is a scale that is easy for
subjects to use and for clinicians and researchers to interpret and permits the
differentiation of clinical cases and controls, or anxious and nonanxious dreamers. (Sleep
and Hypnosis 1999;4:204-211)
| Keywords: nightmare, dream anxiety, scale, validity, reliability, and internal homogeneity |
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