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The PsychoSomatic Problems Scale: an analysis of the psychometric properties using Australian adolescent data
Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Centre for Research on Child and Adolescent Mental Health. Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Department of Political, Historical, Religious and Cultural Studies.ORCID iD: 0000-0001-9541-3673
2015 (English)Conference paper, Oral presentation only (Refereed)
Abstract [en]

 

Background: The PsychoSomatic problems Scale (PSP-Scale) has frequently been used in the Scandinavian countries in order to monitor adolescent psychosomatic health. According to Psychometric analyses based on the the polytomous Rasch model, the PSP-scale shows good measurement properties (see Hagquist, 2008). However, the properties of the PSP-scale have not been examined for non-European samples and for younger adolescents.

Aims: The purpose of the present study is to examine the psychometric properties of the PsychoSomatic Problems Scale by means of the polytomous Rasch model using an Australian sample of younger adolescents (school year 3-7).   

Sample: Using a paper-and-pencil based survey, the data was collected among 758 adolescents enrolled (school year 3-7) in schools in central Perth of Western Australia in 2013.  

Methods: The PSP-scale consists of eight polytomous items intended to tap information about student experiences of psychosomatic health complaints. The PSP-scale was analysed by means of the polytomous Rasch model. General fit statistics as well as their graphical representations (ICC) are used to evaluate if the data fit the Rasch model. A particular focus is also directed towards possible Differential Item Functioning (DIF) across school year and sex.

Results: At a general level of analysis, the scale seems to fit the Rasch model fairly well, with good targeting and separation of the individuals. However, some of the items showed reversed item thresholds, indicating that the response categories did not work as expected in the Australian setting. Further there seems to be some tendencies of Differential item functioning by grade.

Conclusions: In comparing the psychosomatic problems among different age groups, in particular younger and older, the analyst needs to be particularly cautious. Also, cultural and language aspects need to be addressed if an instrument is to be used in a different setting than the one it was developed in.   

Future directions: There seems to be a lack of instruments useful for invariant measurement of psychosomatic health among adolescents in different age groups. However, in order to achieve invariant measurement across age groups, efforts to develop instruments are required, in particular if older and younger adolescents  are to be compared. 

Further comments:

Hagquist, C. (2008). Psychometric Properties of the PsychoSomatic Problems Scale: A Rasch Analysis on Adolescent Data. Social Indicators Research, 86: 511-523.

Place, publisher, year, edition, pages
Fukuoka, Japan, 2015.
National Category
Sociology
Identifiers
URN: urn:nbn:se:kau:diva-37996OAI: oai:DiVA.org:kau-37996DiVA, id: diva2:855409
Conference
The Pacific Rim Objective Measurement Symposium, 2015, August 20-24, Fukuoka, Japan
Available from: 2015-09-21 Created: 2015-09-21 Last updated: 2015-10-23Bibliographically approved

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Bergh, Daniel

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