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The Severity Indices of Personality Problems (SIPP) : A new dimensional questionnaire for measuring (mal)adaptive personality functioning. Helene Andrea (PhD) 1 Roel Verheul (PhD) 2 Joost Hutsebaut (PhD) 2 Dineke Feenstra (MSc) 1 Espen Arnevik (PhD) 3
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The Severity Indices of Personality Problems (SIPP):A new dimensional questionnaire for measuring (mal)adaptive personality functioning Helene Andrea (PhD)1 Roel Verheul (PhD)2 Joost Hutsebaut (PhD)2Dineke Feenstra (MSc)1Espen Arnevik (PhD)3 1 Viersprong Institute for Studies on Personality Disorders (VISPD), Halsteren, the Netherlands 2 Center for Psychotherapy de Viersprong, Halsteren, the Netherlands 3 Dept Research & Education, Ulleval University Hospital, Oslo, Norway APA Annual Meeting, San Francisco, 18 May 2009
Contents Background Why a new questionnaire Psychometrics (factor structure, reliability) New results Discriminant validity (symptomatic measurements) Convergent validity (personality measurements) Sensitivity to change Discussion & further research
Why a new questionnaire Dimensional measurement that combines: Broad scope of central elements personality pathology Relating maladaptive to adaptive capacities Developed to measure change Easy to administer (self-report & limited number of items) Verheul, Andrea et al (2008). Psychol Assessment, 20, 23-34
Overview SIPP-questionnaire 118 items, 16 facets (subscales), 5 higher-order domains Lower score = more maladaptive level of functioning Higher score = more adaptive level of functioning Examples • • FullydisagreePartlydisagreePartlyagreeFullyagree Website:http://hdl.handle.net/1765/10066 Publication: Verheul, Andrea et al (2008). Psychol Assessment, 20, 23-34
Results confirmative factor analysis Website: http://hdl.handle.net/1765/10066
Psychometric qualities final model • Good model fit among different populations: • Good internal consistency facets(median Cronbach’s .77; range .69-.88) • Good test-retest reliability (median ICC .92; range .85-.95) Website: http://hdl.handle.net/1765/10066
Method: Study samples & Instruments SCL-90: Symptom Check List(Derogatis, 1983; Arrindell et al, 2003) CIP: Circumplex of Interpersonal Problems(Pederson, 2000) NEO-PI-R: NEO Personality Inventory-Revised(Costa & McCrae, 1992) DAPP: Dimensional Assessment of Personality Pathology(Livesley & Jackson, 2002)
SIPP & Symptomatic distress (SCL) Overall median correlation: -0.28 Discriminative validity (partially) present
Comparison with other personality measures (I): SIPP – NEO / CIP Higher correlations refer to plausible associations
Comparison with other personality measures (II): SIPP – DAPP Overall median correlation: -0.36 Partially convergent, partially discriminative validity Verheul, Andrea et al (2008). Psychol Assessment, 20, 23-34
Summary Validity Studies • Evidence for meaningful associations with other personality measurements (convergent validity) • Also evidence for lower associations with symptomatic measurements (discriminative validity)
Method • Follow ups: 1 year and 3 years after start treatment
SIPP domains at baseline and follow-ups Effect sizes: 0.73 & 1.02 Effect sizes: 0.95 & 1.17 Effect sizes: 0.57 & 0.69 Effect sizes: 0.18 & 0.58 Effect sizes: 0.18 & 0.40 More adaptive scores after treatment
DiscussionValues of the SIPP Dimensional measurement core components personality pathologySelf-control, identity integration, relational capacities, social concordance, responsibility Promising psychometric resultsFactorial model, reliability, validity More adaptive scores after treatment
Further research SIPP as outcome instrument in effectiveness studies Predictive validity: - Symptomatic improvement necessary for improvement on SIPP?- Improvement on SIPP necessary for functional improvement? SIPP part of studies DSM-V personality disorders workgroup
Availability of the SIPP Diagnostic version: 118 items, 16 facets, 5 domainsOutcome version (SIPP-SF): 60 items, 5 domains Available in Dutch, English, Norwegian, Spanish and Italian In exchange for research data Websites: www.vispd.nl (click on heading sipp-main menu; five subpages) http://hdl.handle.net/1765/10066 Email: Helene.andrea@deviersprong.nl