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The Portuguese version of the Personal and Social Performance Scale (PSP): reliability, validity, and relationship with cognitive measures in hospitalized and community schizophrenia patients

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Abstract

Purpose

Deficits in social functioning are a core feature of schizophrenia and are influenced by both symptomatic and neurocognitive variables. In the present study we aimed to determine the reliability and validity of the Portuguese version of the Personal and Social Performance (PSP) scale, and possible correlations with measures of cognitive functioning.

Methods

One-hundred and four community and inpatients with schizophrenia were assessed using measures of social functioning and symptom severity alongside measures of executive function, processing speed, and verbal memory.

Results

Convergent validity with the GAF in the four domains of the PSP varied from 0.357 to 0.899. Reliability was found to be satisfactory, with a Cronbach’s alpha coefficient of 0.789. Inter-rater reliability in the four domains of the PSP varied from 0.430 to 0.954. Low-functioning patients (PSP < 70) were older, had longer duration of illness, were more symptomatic and had worse cognitive performances, as compared with high-functioning patients (PSP ≥ 70). In a regression model, deficits in social functioning were strongly predicted both by symptomatic and neurocognitive variables; these together accounted for up to 62% of the variance.

Conclusions

The present study supports the reliability and validity of the Portuguese language version of the PSP and further supports the original measure. The co-administration of brief cognitive assessments with measures of functioning may lead to more focused interventions, possibly improving outcomes in this group.

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Acknowledgments

This study was supported by an unrestricted educational grant from Janssen-Cilag Pharmaceutical, Portugal. Sofia Brissos received support to attend a residential workshop on Social Functioning in Schizophrenia, in Corpus Christy College, at the University of Oxford, UK. The authors thank Prof. Vasco Videira Dias for training in the neurocognitive measures, and advice on neurocognitive data analysis.

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Authors and Affiliations

  1. Lisbon’s Psychiatric Hospitalar Centre, Rua Conde Redondo, nº 8 3º dt, 1150-105, Lisbon, Portugal

    Sofia Brissos, Filipa Palhavã, João Gama Marques & Susana Mexia

  2. Janssen-Cilag Pharmaceutical, Rua Conde Redondo, nº 8 3º dt, 1150-105, Lisbon, Portugal

    Sofia Brissos

  3. Department of Psychiatry, Santa Maria’s University Hospital, Lisbon, Portugal

    Ana Lisa Carmo, Manuel Carvalho, Cátia Dias, João Data Franco, Rita Mendes, Pedro Zuzarte & Maria Luisa Figueira

  4. Faculty of Human Kinetics, Technical University of Lisbon, Lisbon, Portugal

    Ana Isabel Carita

  5. Department of Psychiatry, Social Psychiatry Group, Oxford University, Oxford, UK

    Andrew Molodynski

  6. Faculty of Medicine, University of Lisbon, Lisbon, Portugal

    Maria Luisa Figueira

Authors
  1. Sofia Brissos
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  2. Filipa Palhavã
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  3. João Gama Marques
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  5. Ana Lisa Carmo
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  6. Manuel Carvalho
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  9. Rita Mendes
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  10. Pedro Zuzarte
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  13. Maria Luisa Figueira
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Corresponding author

Correspondence to Sofia Brissos.

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Brissos, S., Palhavã, F., Marques, J.G. et al. The Portuguese version of the Personal and Social Performance Scale (PSP): reliability, validity, and relationship with cognitive measures in hospitalized and community schizophrenia patients. Soc Psychiatry Psychiatr Epidemiol 47, 1077–1086 (2012). https://doi.org/10.1007/s00127-011-0412-6

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  • DOI: https://doi.org/10.1007/s00127-011-0412-6

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