Three different measures of internal reliability were calculated for each of the 12 scales from the Inpatient Multidimensional Psychiatric Scale with data from a sample of 1654 inpatients. The homogeneity of the items forming the different scales could be assessed and the least homogeneous scales examined in more detail. The minimum number of items necessary to bring Cronbach's alpha to over .90 was also calculated for each scale and satisfactory figures were obtained.
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References
1.
BarthelmesH.Von ZerssenD.Das Muenchener Psychiatrische Informationssystem (PSYCHIS Muenchen). In ReichertzP. L.SchwarzB. (Eds.), Informationssysteme in der medizinischen Versorgung. Oekologie der Systeme, Bericht de 21. Jahrestagung der DGMDIS e.V.Stuttgart: Schattauer, 1978. Pp. 138–145.
2.
BartkoJ. J.CarpenterW. T.On the methods and theory of reliability. Journal of Nervous and Mental Disease, 1976, 163, 307–317.
3.
CronbachL.Coefficient alpha and the internal structure of tests. Psychometrika, 1951, 16, 297–334.
4.
DegkwitzR.HelmchenH.KockottG.MombourW.Diagnosenschluessel und Glossar psychiatrischer Krankheiten: ICD (ICD = International Classification of Diseases). Deutsche Ausgabe der Internationalen Klassifikation der WHO und des Internationalen Glossars. (8th rev.)Berlin: Springer, 1971.
5.
GuilfordJ. P.Psychometric methods. New York: McGraw-Hill, 1954.
6.
GuttmanL.A basis for analysing test-retest reliability. Psychometrika, 1945, 10, 225–282.
7.
HoytC.Test reliability estimated by analysis of variance. Psychometrika, 1941, 6, 153–160.
8.
JacobiP.Untersuchungen zur Faktorenstruktur, Zuverlaessigkeit und Gueltigkeit einer deutschen Bearbeitung der IMPS nach Lorr. Unpublished doctoral dissertation, Univer. of Hamburg, 1974.
9.
LienertG. A.Testaufbau und Testanalyse. Weinheim: Beltz, 1961.
10.
LorrM. (Ed.) Explorations in typing psychotics. London: Pergamon, 1966.
Von ZerssenD.Klinische Selbstbeurteilungs-Skalen (KSb-S) aus dem Muenchener Psychiatrischen Informations-System (PSYCHIS Muenchen). (a) Allgemeiner Teil, (b) Die Paranoid-Depressivitaets-Skala, (c) Die Befindlichkeits-Skala, (d) Die Beschwerden-Liste. Weinheim: Beltz, 1976.
