title: [Sample and time invariance of test characteristic values in a symptom list].
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000523:psychology*; D008875:Middle Aged; D011581:Psychological Tests; D011594:Psychometrics; D011602:Psychophysiologic Disorders / Q000523:psychology*
vernacular_title: Zur Stichproben- und Zeitinvarianz von Testkennwerten bei einer Beschwerdenliste.